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/*
cacosh.c
Contributed by Danny Smith
2003-10-20
*/
#include <math.h>
#include <complex.h>
#if 0
/* cacosh (z) = I * cacos (z) */
double complex cacosh (double complex Z)
{
double complex Tmp;
double complex Res;
Tmp = cacos (Z);
__real__ Res = -__imag__ Tmp;
__imag__ Res = __real__ Tmp;
return Res;
}
#else
/* cacosh (z) = I * cacos (z) = I * (pi/2 - casin (z)) */
double complex cacosh (double complex Z)
{
double complex Tmp;
double complex Res;
Tmp = casin (Z);
__real__ Res = __imag__ Tmp;
__imag__ Res = M_PI_2 - __real__ Tmp;
return Res;
}
#endif
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