\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8012 = b;
double r8013 = atan2(r8012, r8012);
double r8014 = sqrt(r8013);
double r8015 = a;
double r8016 = r8012 - r8015;
double r8017 = pow(r8014, r8016);
double r8018 = sin(r8017);
return r8018;
}