catanh
, catanhf
—complex arc hyperbolic tangent#include <complex.h> double complex catanh(double complex z); float complex catanhf(float complex z);
Description
These functions compute the complex arc hyperbolic tan of z,
with branch cuts outside the interval [-1, +1] along the
real axis.
catanhf
is identical to catanh
, except that it performs
its calculations on floats complex
.
Returns
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*p/2, +i*p/2] along the
imaginary axis.
Portability
catanh
and catanhf
are ISO C99