C Programming/complex.h/catanh

Prototypes

double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);

Description

These functions shall return the complex arc hyperbolic tangent value, in the range of a strip mathematically unbounded along the real axis and in the interval [-iπ/2, +iπ/2] along the imaginary axis.