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Math387.ArcTan2 Method
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Inverse tangens of Y/X.

Syntax
C#
Visual Basic
public static double ArcTan2([In] double Y, [In] double X);
Returns

the inverse tangens of Y/X, and returns an angle in the correct quadrant.

Remarks

The return value will fall in the closed interval [-PI,PI] radians. 

Note ArcTan is calculated as ArcTan2(1, X).

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