Calculates the arc cosine of a complex number.

[Format]

#include <complex.h>

float complex cacosf(float complex z);

double complex cacos(double complex z);

long double complex cacosl(long double complex z);

[Parameters]

z Complex number for which arc cosine is to be computed

[Return values]

Complex arc cosine of z

[Remarks]

The cacos function returns the arc cosine in the range [0, π] on the real axis and in the infinite range on the imaginary axis.