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