\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8065 = b;
double r8066 = atan2(r8065, r8065);
double r8067 = sqrt(r8066);
double r8068 = a;
double r8069 = r8065 - r8068;
double r8070 = pow(r8067, r8069);
double r8071 = sin(r8070);
return r8071;
}