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ctan, ctanf, ctanl – complex tangent function
USAGE
#include <complex.h>

double complex ctan(double complex z);
float complex ctanf(float complex z);
long double complex ctanl(long double complex z);

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cos, cosf, cosl – cosine function
USAGE
#include <math.h>

double cos(double x);
float cosf(float x);
long double cosl(long double x);

Link with -lm.

DESCRIPTION
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ccos, ccosf, ccosl – complex cosine function
USAGE
#include <complex.h>

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

[...]

catan, catanf, catanl – complex arc tangents
USAGE
#include <complex.h>

double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);

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casin, casinf, casinl – complex arc sine
USAGE
#include <complex.h>

double complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex z);

[...]

cacos, cacosf, cacosl – complex arc cosine
USAGE
#include <complex.h>

double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);

[...]