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 r8488092 = lambda1;
        double r8488093 = lambda2;
        double r8488094 = r8488092 - r8488093;
        double r8488095 = sin(r8488094);
        double r8488096 = phi2;
        double r8488097 = cos(r8488096);
        double r8488098 = r8488095 * r8488097;
        double r8488099 = phi1;
        double r8488100 = cos(r8488099);
        double r8488101 = sin(r8488096);
        double r8488102 = r8488100 * r8488101;
        double r8488103 = sin(r8488099);
        double r8488104 = r8488103 * r8488097;
        double r8488105 = cos(r8488094);
        double r8488106 = r8488104 * r8488105;
        double r8488107 = r8488102 - r8488106;
        double r8488108 = atan2(r8488098, r8488107);
        return r8488108;
}