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.
| Item | Description |
|---|---|
| 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.