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.
Math.atan(
x
)
x
A number.
A number.
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.