DragonFly On-Line Manual Pages

ATAN(3) 	      DragonFly Library Functions Manual	       ATAN(3)

NAME

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

SYNOPSIS

#include <math.h> double atan(double x); float atanf(float x); long double atanl(long double x);

DESCRIPTION

The atan() function computes the principal value of the arc tangent of x in the range [-pi/2, +pi/2]. The atanf() function is a single precision version of atan(). The atanl() function is an extended precision version of atan().

SEE ALSO

acos(3), asin(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3) DragonFly 4.3 June 5, 2013 DragonFly 4.3