Computes the complex arc hyperbolic tangent.
#include <complex.h> double complex catanh (z) double complex z; float complex catanhf (z) float complex z; long double complex catanhl (z) long double complex z;
The catanh, catanhf, and catanhl subroutines compute the complex arc hyperbolic tangent of z, with branch cuts outside the interval [-1, +1] along the real axis.
| z | Specifies the value to be computed. |
The catanh, catanhf, and catanhl subroutines return the complex arc hyperbolic tangent value, in the range of a strip mathematically unbounded along the real axis and in the interval [-i pi/2, +i pi/2] along the imaginary axis.
catan, catanf, or catanl Subroutine