atanf(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''). FreeBSD 5.4 May 2, 1991 FreeBSD 5.4
SPONSORED LINKS
Man(1) output converted with man2html , sed , awk