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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)
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