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catan(3M)						  Mathematical Library Functions						 catan(3M)

NAME
       catan, catanf, catanl - complex arc tangent functions

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <complex.h>

       double complex catan(double complex z);

       float complex catanf(float complex z);

       long double complex catanl(long double complex z);

DESCRIPTION
       These functions compute the complex arc tangent of z, with branch cuts outside the interval [ -i, +++++pipii ] along the imaginary axis.

RETURN VALUES
       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.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       complex.h(3HEAD), ctan(3M), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							 catan(3M)