ccos, ccosf, ccosl - complex cosine function

#include <complex.h>

double complex ccos(double complex z);
float complex ccosf(float complex z);
long double complex ccosl(long double complex z);

Link with -lm.

These functions calculate the complex cosine of z.

The complex cosine function is defined as:

    ccos(z) = (exp(i * z) + exp(-i * z)) / 2

cabs(3), cacos(3), csin(3), ctan(3), complex(7)