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.atan(  x  ) 

Parameters
x A number.

Returns
A number.

Description
Method; computes and returns the arc tangent for the number specified in the parameter x . The return value is between negative pi divided by 2, and positive pi divided by 2.