/*  csin.c */

/*
   Contributed by Danny Smith
   2003-10-20
*/

#include <math.h>
#include <complex.h>

/* csin (x + I * y) = sin (x) * cosh (y)
    + I * (cos (x) * sinh (y)) */ 

double complex csin (double complex Z)
{
  double complex Res;
  __real__ Res = sin (__real__ Z) * cosh ( __imag__ Z);
  __imag__ Res = cos (__real__ Z) * sinh ( __imag__ Z);
  return Res;
}