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/*
cacoshl.c
Contributed by Danny Smith
2005-01-04
*/
#include <math.h>
#include <complex.h>
#if 0
/* cacosh (z) = I * cacos (z) */
long double complex cacoshl (long double complex Z)
{
long double complex Tmp;
long double complex Res;
Tmp = cacosl (Z);
__real__ Res = -__imag__ Tmp;
__imag__ Res = __real__ Tmp;
return Res;
}
#else
/* cacosh (z) = I * cacos (z) = I * (pi/2 - casin (z)) */
#ifndef _M_PI_2L
#define _M_PI_2L 1.5707963267948966192313L
#endif
long double complex cacoshl (long double complex Z)
{
long double complex Tmp;
long double complex Res;
Tmp = casinl (Z);
__real__ Res = __imag__ Tmp;
__imag__ Res = _M_PI_2L - __real__ Tmp;
return Res;
}
#endif
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