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