C++ Programming/Code/Standard C Library/Functions/acos

acos

Syntax

#include <cmath> double acos( double arg );

The acos() function returns the arc cosine of arg, which will be in the range [0, pi]. arg should be between -1 and 1. If arg is outside this range, acos() returns NAN and raises a floating-point exception.

Related topics

asin - atan - atan2 - cos - cosh - sin - sinh - tan - tanh