catan
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Name

catan, catanf, catanl — complex arc tangents

Synopsis

#include <complex.h>
double complex catan( double complex   z);
float complex catanf( float complex   z);
long double complex catanl( long double complex   z);
[Note] Note

Link with −lm.

DESCRIPTION

The catan() function calculates the complex arc tangent of z. If y = catan(z), then z = ctan(y). The real part of y is chosen in the interval [−pi/2,pi/2].

One has:

    catan(z) = 1 / 2i clog((1 + iz) / (1 − iz))

CONFORMING TO

C99

SEE ALSO

ccos(3), clog(3), complex(7)

COLOPHON

This page is part of release 2.79 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


  Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL
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