1#include "libm.h"
2
3// FIXME: Hull et al. "Implementing the complex arcsine and arccosine functions using exception handling" 1997
4
5/* acos(z) = pi/2 - asin(z) */
6
7double complex cacos(double complex z)
8{
9	z = casin(z);
10	return CMPLX(M_PI_2 - creal(z), -cimag(z));
11}
12