Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
ATAN(3)			 BSD Library Functions Manual		       ATAN(3)

NAME
     atan, atanf -- arc	tangent	functions of one variable

LIBRARY
     Math Library (libm, -lm)

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.	For a discussion of error due to roundoff, see
     math(3).

RETURN VALUES
     The atan()	and the	atanf()	function returns the arc tangent 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 ISO/IEC 9899:1990 ("ISO C90").

BSD				  May 2, 1991				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=atan&sektion=3&manpath=FreeBSD+5.2-RELEASE+and+Ports>

home | help