# Math.atan2()

#### 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.