Availability
Flash Player 5. In Flash Player 4, the methods and properties of the Math object are emulated using approximations and may not be as accurate as the non-emulated math functions supported by Flash Player 5.

Usage

 Math.atan2(  y, x  ) 

Parameters
x A number specifying the x coordinate of the point.

y A number specifying the y coordinate of the point.

Returns
A number.

Description
Method; computes and returns the arc tangent of y/x in radians. The return value represents the angle opposite the opposite angle of a right triangle, where x is the adjacent side length and y is the opposite side length.