\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r7976 = b;
double r7977 = atan2(r7976, r7976);
double r7978 = sqrt(r7977);
double r7979 = a;
double r7980 = r7976 - r7979;
double r7981 = pow(r7978, r7980);
double r7982 = sin(r7981);
return r7982;
}