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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);

[...]

acos, acosf, acosl – arc cosine function
USAGE
#include <math.h>

double acos(double x);
float acosf(float x);
long double acosl(long double x);

Link with -lm.

DESCRIPTION
[...]

acos, acosf, acosl – arc cosine function
USAGE
#include <math.h>

double acos(double x);
float acosf(float x);
long double acosl(long double x);

Link with -lm.

DESCRIPTION
[...]

acos, acosf, acosl – arc cosine function
USAGE
#include <math.h>

double acos(double x);
float acosf(float x);
long double acosl(long double x);

Link with -lm.

DESCRIPTION
[...]