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#include "complex_impl.h"
// FIXME: Hull et al. "Implementing the complex arcsine and arccosine functions using exception handling" 1997
/* acos(z) = pi/2 - asin(z) */
double complex cacos(double complex z)
{
z = casin(z);
return CMPLX(M_PI_2 - creal(z), -cimag(z));
}
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