Manual of CCOSH(3) (v2.18)

complex math routines

NAME

ccosh, ccoshf, ccoshl - complex hyperbolic cosine

#include <complex.h>

double complex ccosh(double complex z);
float complex ccoshf(float complex z);
long double complex ccoshl(long double complex z);

Link with -lm.

The complex hyperbolic cosine function ccosh(z) is defined as (exp(z)+exp(-z))/2.

C99