Gradients Used in the Jacobian

These aren’t very enlightening, but they’re included for the sake of completeness. There are no guarantees that these are the same as the ones I actually used, since I had to process them heavily from the python versions and I’m not very good at automated replacing.

v=











r1
r2
r3
r4
θ1
hx
hy
Ox
Oy











vSy










hx(−2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r4sin(θ1) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r1 − 4r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos(θ1) + 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin(θ1))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r1 + 2r4cos(θ1) + 2r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + cos(θ1)) + hy(−sin(θ1) − 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r4sin(θ1) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r1 − 4r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos(θ1) + 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin(θ1))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r1 + 2r4cos(θ1) + 2r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))))
hy(−2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(2r4sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r2 − 4r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos((θ2)j) − 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin((θ2)j))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r2 − 2r4cos((θ2)j) + 2r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + sin((θ2)j)) + (1 − hx)cos((θ2)j) − 2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(2r4sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r2 − 4r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos((θ2)j) − 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin((θ2)j))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r2 − 2r4cos((θ2)j) + 2r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))
−2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(2r3(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)) + 2r3σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) − 2hyr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(2r3(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)) + 2r3σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) 
hx(−2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r1sin(θ1) + 2r2sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−2r4(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 0.5(−4r2cos((θ2)j) + 4r1cos(θ1))(−2r2r4cos((θ2)j) + 2r1r4cos(θ1)) + 0.5(−4r2sin((θ2)j) + 4r1sin(θ1))(−2r2r4sin((θ2)j) + 2r1r4sin(θ1)))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r4 − 2r2cos((θ2)j) + 2r1cos(θ1))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) + hy(−sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) − 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r1sin(θ1) + 2r2sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−2r4(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 0.5(−4r2cos((θ2)j) + 4r1cos(θ1))(−2r2r4cos((θ2)j) + 2r1r4cos(θ1)) + 0.5(−4r2sin((θ2)j) + 4r1sin(θ1))(−2r2r4sin((θ2)j) + 2r1r4sin(θ1)))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r4 − 2r2cos((θ2)j) + 2r1cos(θ1))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) 
hx(−r1sin(θ1) − 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos(θ1)2cos((θ2)j)sin((θ2)j) + 4r1r2sin(θ1)2cos((θ2)j)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r1r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin(θ1) + 2r1r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos(θ1)) − 2r1r4cos(θ1)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(−2r1r4sin(θ1) − 2r1r2sin(θ1)2cos((θ2)j)sin((θ2)j) + 2r1r2cos(θ1)2cos((θ2)j)sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) + hy(−r1cos(θ1) − 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos(θ1)2cos((θ2)j)sin((θ2)j) + 4r1r2sin(θ1)2cos((θ2)j)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r1r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin(θ1) + 2r1r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos(θ1)) − 2r1r4cos(θ1)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(−2r1r4sin(θ1) − 2r1r2sin(θ1)2cos((θ2)j)sin((θ2)j) + 2r1r2cos(θ1)2cos((θ2)j)sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) 
r1cos(θ1) + r4cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) − r2cos((θ2)j
r2sin((θ2)j) − r1sin(θ1) − r4sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))
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hx(2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r4sin(θ1) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r1 − 4r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos(θ1) + 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin(θ1))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r1 + 2r4cos(θ1) + 2r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + sin(θ1)) + hy(−cos(θ1) + 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r4sin(θ1) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r1 − 4r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos(θ1) + 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin(θ1))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r1 + 2r4cos(θ1) + 2r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))))
hy(2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(2r4sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r2 − 4r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos((θ2)j) − 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin((θ2)j))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r2 − 2r4cos((θ2)j) + 2r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + cos((θ2)j)) + (1 − hx)sin((θ2)j) + 2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(2r4sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(4r2 − 4r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))cos((θ2)j) − 2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))sin((θ2)j))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r2 − 2r4cos((θ2)j) + 2r1cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) 
2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(2r3(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)) + 2r3σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + 2hyr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(2r3(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)) + 2r3σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) 
hx(2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r1sin(θ1) + 2r2sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−2r4(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 0.5(−4r2cos((θ2)j) + 4r1cos(θ1))(−2r2r4cos((θ2)j) + 2r1r4cos(θ1)) + 0.5(−4r2sin((θ2)j) + 4r1sin(θ1))(−2r2r4sin((θ2)j) + 2r1r4sin(θ1)))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r4 − 2r2cos((θ2)j) + 2r1cos(θ1))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) + hy(−cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) + 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2r1sin(θ1) + 2r2sin((θ2)j) + σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−2r4(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) + 0.5(−4r2cos((θ2)j) + 4r1cos(θ1))(−2r2r4cos((θ2)j) + 2r1r4cos(θ1)) + 0.5(−4r2sin((θ2)j) + 4r1sin(θ1))(−2r2r4sin((θ2)j) + 2r1r4sin(θ1)))) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(−2r4 − 2r2cos((θ2)j) + 2r1cos(θ1))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) 
hx(r1cos(θ1) + 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos(θ1)2cos((θ2)j)sin((θ2)j) + 4r1r2sin(θ1)2cos((θ2)j)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r1r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin(θ1) + 2r1r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos(θ1)) − 2r1r4cos(θ1)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(−2r1r4sin(θ1) − 2r1r2sin(θ1)2cos((θ2)j)sin((θ2)j) + 2r1r2cos(θ1)2cos((θ2)j)sin((θ2)j)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) + hy(r1sin(θ1) + 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos(θ1)2cos((θ2)j)sin((θ2)j) + 4r1r2sin(θ1)2cos((θ2)j)sin((θ2)j))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r1r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin(θ1) + 2r1r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos(θ1)) − 2r1r4cos(θ1)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(−2r1r4sin(θ1) − 2r1r2sin(θ1)2cos((θ2)j)sin((θ2)j) + 2r1r2cos(θ1)2cos((θ2)j)sin((θ2)j)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) 
r1sin(θ1) + r4sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j)))) − r2sin((θ2)j
r2cos((θ2)j) − r1cos(θ1) − r4cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))  











∂Sx
∂(θ2)j
=hy(r2cos((θ2)j) − 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos((θ2)j)2cos(θ1)sin(θ1) + 4r1r2sin((θ2)j)2cos(θ1)sin(θ1))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos((θ2)j) + 2r2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin((θ2)j)) + 2r2r4cos((θ2)j)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(2r2r4sin((θ2)j) − 2r1r2sin((θ2)j)2cos(θ1)sin(θ1) + 2r1r2cos((θ2)j)2cos(θ1)sin(θ1)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) − r2(1 − hx)sin((θ2)j) − 2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos((θ2)j)2cos(θ1)sin(θ1) + 4r1r2sin((θ2)j)2cos(θ1)sin(θ1))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos((θ2)j) + 2r2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin((θ2)j)) + 2r2r4cos((θ2)j)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(2r2r4sin((θ2)j) − 2r1r2sin((θ2)j)2cos(θ1)sin(θ1) + 2r1r2cos((θ2)j)2cos(θ1)sin(θ1)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))
∂Sy
∂(θ2)j
=hy(−r2sin((θ2)j) + 2r4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos((θ2)j)2cos(θ1)sin(θ1) + 4r1r2sin((θ2)j)2cos(θ1)sin(θ1))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos((θ2)j) + 2r2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin((θ2)j)) + 2r2r4cos((θ2)j)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(2r2r4sin((θ2)j) − 2r1r2sin((θ2)j)2cos(θ1)sin(θ1) + 2r1r2cos((θ2)j)2cos(θ1)sin(θ1)))sin(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))) + r2(1 − hx)cos((θ2)j) + 2hxr4/(1 + (σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))2(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2))(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5(−0.5(−4r1r2cos((θ2)j)2cos(θ1)sin(θ1) + 4r1r2sin((θ2)j)2cos(θ1)sin(θ1))(r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j)) − 2r2r4(−2r2r4sin((θ2)j) + 2r1r4sin(θ1))cos((θ2)j) + 2r2r4(−2r2r4cos((θ2)j) + 2r1r4cos(θ1))sin((θ2)j)) + 2r2r4cos((θ2)j)) + (r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(−2)(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))(2r2r4sin((θ2)j) − 2r1r2sin((θ2)j)2cos(θ1)sin(θ1) + 2r1r2cos((θ2)j)2cos(θ1)sin(θ1)))cos(2atan(1/(r12 + r22 + r42 − r32 − 2r1r4cos(θ1) + 2r2r4cos((θ2)j) − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))(σ((−2r2r4cos((θ2)j) + 2r1r4cos(θ1))2 + (−2r2r4sin((θ2)j) + 2r1r4sin(θ1))2 − (r12 + r22 + r42 − r32 − 2r1r2cos(θ1)cos((θ2)j)sin(θ1)sin((θ2)j))2)0.5 − 2r1r4sin(θ1) + 2r2r4sin((θ2)j))))

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