atan man page on BSDi

atan man page on BSDi

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ATAN(3)			    BSD Programmer's Manual		       ATAN(3)

NAME
     atan, atanf - arc tangent functions of one variable

SYNOPSIS
     #include <math.h>

     double
     atan(double x);

     float
     atanf(float x);

DESCRIPTION
     The atan() and the atanf() functions compute the principal value of the
     arc tangent of x, in the range [-pi/2, +pi/2] radians.

SEE ALSO
     acos(3),  asin(3),	 atan2(3),  cos(3),  cosh(3),  math(3),	 sin(3),
     sinh(3),  tan(3),	tanh(3)

STANDARDS
     The atan() function conforms to ANSI C X3.159-1989 (``ANSI C '').

BSDI BSD/OS			  May 2, 1991				     1

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