sin.c

#include "lib/math.h"
 
double sin(double rads) {
    size_t steps = 16;
    double result = rads / fac(1);
 
    bool flag = false;
 
    for (size_t i = 3; i < steps + 1; i += 2) {
        if (!flag) {
            result -= pow(rads, i) / fac(i);
        } else {
            result += pow(rads, i) / fac(i);
        }
 
        flag = !flag;
    }
 
    return result;
}