7.3.5.1 The cacos functions

Synopsis

1

#include <complex.h>
double complex cacos(double complex z);
float complex cacosf(float complex z);
long double complex cacosl(long double complex z);

Description

2

The cacos functions compute the complex arc cosine of z, with branch cuts outside the interval [-1, +1] along the real axis.

Returns

3

The cacos functions return the complex arc cosine value, in the range of a strip mathematically unbounded along the imaginary axis and in the interval [0, pi ] along the real axis.