NAME¶

ccos, ccosf, ccosl - complex cosine function

SYNOPSIS¶

#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.

DESCRIPTION¶

These functions calculate the complex cosine of z.

The complex cosine function is defined as:

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

VERSIONS¶

These functions first appeared in glibc in version 2.1.

ATTRIBUTES¶

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

CONFORMING TO¶

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

SEE ALSO¶

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

COLOPHON¶

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