Flash CS3 Documentation

ActionScript 2.0 Language Reference > ActionScript classes > Math > atan (Math.atan method)

atan (Math.atan method)

Computes and returns the value, in radians, of the angle whose tangent is specified in the parameter tangent. The return value is between negative pi divided by 2 and positive pi divided by 2.

Availability: ActionScript 1.0; Flash Player 5 - In Flash Player 4, the methods and properties of the Math class are emulated using approximations and might not be as accurate as the non-emulated math functions that Flash Player 5 supports.

Parameters

tangent:Number - A number that represents the tangent of an angle.

Returns

Number - A number between negative pi divided by 2 and positive pi divided by 2.

Example

The following example displays the angle value for several tangents.

trace(Math.atan(-1)); // output: -0.785398163397448
trace(Math.atan(0)); // output: 0
trace(Math.atan(1)); // output: 0.785398163397448

See also

acos (Math.acos method), asin (Math.asin method), atan2 (Math.atan2 method), cos (Math.cos method), sin (Math.sin method), tan (Math.tan method)

Flash CS3