aTan()

Return an angle with tangent equal to number. A value between -PI/2 and PI/2 (radians) will be returned.

Syntax:
variable = aTan( number )

Example:
print aTan( 1 )
print aTan( 0 )
print aTan( -1 )
will print on console 0.785398, 0, - 0.785398