The function
atan2
(
y
,
x
)
{\displaystyle \operatorname {atan2} (y,x)}
or
arctan2
(
y
,
x
)
{\displaystyle \operatorname {arctan2} (y,x)}
(from "2-argument arctangent") is defined as the angle in the Euclidean plane, given in radians, between the positive x axis and the ray to the point (x, y) ≠ (0, 0).
The f...