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 4.1 June 5, 2013 DragonFly 4.1