21 lines
371 B
C
21 lines
371 B
C
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/*
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ccos.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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/* ccos (x + I * y) = cos (x) * cosh (y)
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+ I * (sin (x) * sinh (y)) */
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double complex ccos (double complex Z)
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{
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double complex Res;
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__real__ Res = cos (__real__ Z) * cosh ( __imag__ Z);
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__imag__ Res = -sin (__real__ Z) * sinh ( __imag__ Z);
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return Res;
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}
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