NAME

ccos, ccosf, ccosl - complex cosine function

LIBRARY

Math library (libm, -lm)

#include <complex.h>

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

These functions calculate the complex cosine of z.

The complex cosine function is defined as:

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

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
ccos (), ccosf (), ccosl ()	Thread safety	MT-Safe

C11, POSIX.1-2008.

glibc 2.1. C99, POSIX.1-2001.