arccos

Returns the inverse cosine of x, in that if cos(val)=n, arccos(n)=val, and the resulting number will be between pi and 0.

NOTE:This will only accept a number between -1 and 1 (anything else will throw an error).

NOTE: This function takes a value in radians, not degrees.

Syntax:

arccos(x)

Returns:

Real

Example:

val = arccos(0);

This will set val to pi/2.