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Showing content from https://webplatform.github.io/docs/javascript/Math/atan2 below:

atan2 · WebPlatform Docs

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

Math.atan2( y , x )

x

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

y

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

var v1 = Math.atan2(2,3);
document.write(v1);

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

Applies To : Math Object

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

• Microsoft Developer Network: Article

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