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