NAME
acos - compute arc cosine
SYNOPSIS
float acos(float x)
DESCRIPTION
Return the arc cosine of the argument.
ERRORS
If the argument is less than -1 or larger than 1, an error will result.
acos - compute arc cosine
float acos(float x)
Return the arc cosine of the argument.
If the argument is less than -1 or larger than 1, an error will result.