Section: Linux Programmer's Manual (3) Updated: 2008-08-11 Local index
catan, catanf, catanl - complex arc tangents
double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);
Link with -lm.
function calculates the complex arc tangent of
If y = catan(z), then z = ctan(y).
The real part of y is chosen in the interval [-pi/2,pi/2].
catan(z) = 1 / 2i clog((1 + iz) / (1 - iz))
These functions first appeared in glibc in version 2.1.
This page is part of release 3.27 of the Linux
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Time: 21:43:10 GMT, April 16, 2011