Cannot sample enough valid points. (more)

\[\lambda_1 + \tan^{-1}_* \frac{\left(\sin theta \cdot \sin delta\right) \cdot \cos \phi_1}{\cos delta - \sin \phi_1 \cdot \sin \left(\sin^{-1} \left(\sin \phi_1 \cdot \cos delta + \left(\cos \phi_1 \cdot \sin delta\right) \cdot \cos theta\right)\right)}\]
\lambda_1 + \tan^{-1}_* \frac{\left(\sin theta \cdot \sin delta\right) \cdot \cos \phi_1}{\cos delta - \sin \phi_1 \cdot \sin \left(\sin^{-1} \left(\sin \phi_1 \cdot \cos delta + \left(\cos \phi_1 \cdot \sin delta\right) \cdot \cos theta\right)\right)}
double f(double lambda1, double phi1, double __attribute__((unused)) phi2, double delta, double theta) {
        double r839854 = lambda1;
        double r839855 = theta;
        double r839856 = sin(r839855);
        double r839857 = delta;
        double r839858 = sin(r839857);
        double r839859 = r839856 * r839858;
        double r839860 = phi1;
        double r839861 = cos(r839860);
        double r839862 = r839859 * r839861;
        double r839863 = cos(r839857);
        double r839864 = sin(r839860);
        double r839865 = r839864 * r839863;
        double r839866 = r839861 * r839858;
        double r839867 = cos(r839855);
        double r839868 = r839866 * r839867;
        double r839869 = r839865 + r839868;
        double r839870 = asin(r839869);
        double r839871 = sin(r839870);
        double r839872 = r839864 * r839871;
        double r839873 = r839863 - r839872;
        double r839874 = atan2(r839862, r839873);
        double r839875 = r839854 + r839874;
        return r839875;
}