Implementation status: to be implemented
double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);
The functions compute the complex arc hyperbolic tangent of z, with branch cuts outside the interval
[-1, +1] along the real axis.
z - a complex number.
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 [-
iπ/2] along the imaginary axis.
No errors are defined.