c99 [ flag... ] file... –lm [ library... ] #include <complex.h> double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);
These functions compute the complex arc hyperbolic tangent of z, with branch cuts outside the interval [ −1, +1 ] along the real axis.
These functions return the complex arc hyperbolic tangent value, in the range of a strip mathematically unbounded along the real axis and in the interval [ −i??/2, +i??/2 ] along the imaginary axis.
No errors are defined.
See attributes(5) for descriptions of the following attributes: