DragonFly On-Line Manual Pages

ACOS(3) 	      DragonFly Library Functions Manual	       ACOS(3)

NAME

acos, acosf, acosl -- arc cosine functions

SYNOPSIS

#include <math.h> double acos(double x); float acosf(float x); long double acosl(long double x);

DESCRIPTION

The acos() function computes the principal value of the arc cosine of x in the range [0, pi]. The acosf() is a single precision version of acos(). The acosl() is an extended precision version of acos().

RETURN VALUES

If |x|>1, acos(x), acosf(x) and acosl(x) set the global variable errno to EDOM.

SEE ALSO

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