Gets the arc cosine of a value.
- Value to return the arc cosine of.
Arc cosine is the inverse of the sin() function. Thus, given an fValue that is some ratio of the adjacent side to the hypotenuse of a right triangle, the acos function returns the appropriate angle (in degrees) of that triangle. The acos function returns a value from 0.0 to 180.0.
author: Charles Feduke, additional contributor(s): Paul Catalano