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

These functions were added in glibc 2.1.

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

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

C99, POSIX.1-2001, POSIX.1-2008.