Cannot sample enough valid points. (more)

\[\tan^{-1}_* \frac{\sin \left(\lambda_1 - \lambda_2\right) \cdot \cos \phi_2}{\cos \phi_1 \cdot \sin \phi_2 - \left(\sin \phi_1 \cdot \cos \phi_2\right) \cdot \cos \left(\lambda_1 - \lambda_2\right)}\]
\tan^{-1}_* \frac{\sin \left(\lambda_1 - \lambda_2\right) \cdot \cos \phi_2}{\cos \phi_1 \cdot \sin \phi_2 - \left(\sin \phi_1 \cdot \cos \phi_2\right) \cdot \cos \left(\lambda_1 - \lambda_2\right)}
double f(double lambda1, double lambda2, double phi1, double phi2) {
        double r3674830 = lambda1;
        double r3674831 = lambda2;
        double r3674832 = r3674830 - r3674831;
        double r3674833 = sin(r3674832);
        double r3674834 = phi2;
        double r3674835 = cos(r3674834);
        double r3674836 = r3674833 * r3674835;
        double r3674837 = phi1;
        double r3674838 = cos(r3674837);
        double r3674839 = sin(r3674834);
        double r3674840 = r3674838 * r3674839;
        double r3674841 = sin(r3674837);
        double r3674842 = r3674841 * r3674835;
        double r3674843 = cos(r3674832);
        double r3674844 = r3674842 * r3674843;
        double r3674845 = r3674840 - r3674844;
        double r3674846 = atan2(r3674836, r3674845);
        return r3674846;
}