newlib-cygwin/winsup/mingw/mingwex/complex/ccosf.c

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/*
ccosf.c
Contributed by Danny Smith
2003-12-24
*/
#include <math.h>
#include <complex.h>
/* ccos (x + I * y) = cos (x) * cosh (y)
+ I * (sin (x) * sinh (y)) */
float complex ccosf (float complex Z)
{
float complex Res;
__real__ Res = cosf (__real__ Z) * coshf ( __imag__ Z);
__imag__ Res = -sinf (__real__ Z) * sinhf ( __imag__ Z);
return Res;
}