Return arc tangent of a pair of measurements

Contract
Return type	wob
Parameter key	Default value	Type
x	req	number

Water Contract
<method number.double.atan2 x=req=number/>

See also: cos, acos, cosh, sin, asin, sinh, tan, atan, tanh, radians_to_degrees, degrees_to_radians, double

Returns the arc tangent of a _subject of type double representing the y value, and its corresponding partner x . The advantage of atan2 over atan is that it can determine in which quadrant the angle lies.

Example: x and y values of a 30 degree angle

1.0.<atan2 3.0.<sqrt /> />.<radians_to_degrees />

30.000000000000004

Example: x and y values of a -30 degree angle

-1.0.<atan2 3.0.<sqrt /> />.<radians_to_degrees />

-30.000000000000004