atan2

Summary

Returns the angle (in radians) from the X axis to a point ( y , x ).

Syntax

Math.atan2( y , x )

x

Required. A numeric expression representing the cartesian x-coordinate.

y

Required. A numeric expression representing the cartesian y-coordinate.

Examples

var v1 = Math.atan2(2,3);
document.write(v1);
// Output: 0.5880026035475675

Remarks

The return value is between -pi and pi. It represents the angle of the supplied ( y , x ) point, in radians.

Applies To : Math Object

See also

Other articles

• Math.atan Function
• Math.tan Function
• Math Object

Attributions

• Microsoft Developer Network: Article