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

21 lines
371 B
C

/*
ccos.c
Contributed by Danny Smith
2003-10-20
*/
#include <math.h>
#include <complex.h>
/* ccos (x + I * y) = cos (x) * cosh (y)
+ I * (sin (x) * sinh (y)) */
double complex ccos (double complex Z)
{
double complex Res;
__real__ Res = cos (__real__ Z) * cosh ( __imag__ Z);
__imag__ Res = -sin (__real__ Z) * sinh ( __imag__ Z);
return Res;
}