|val||The angle (in radians) to return the tangent of.|
In a right angled triangle tan(val) = Opposite / Adjacent
where val is one of the three angles.
NOTE: The value returned is in radians, not degrees.
Note: Pi/2, (3 pi/2), -pi/2 and a vast number of other values will error with this function due to their returning infinity, a graph representation of this would produce asymptotes at these values.
val = tan( pi );
This will set val to 0.