Atan2

Rare card · No. 71529

In computing and mathematics, the function atan2 is the 2-argument arctangent. By definition, θ = atan2 ⁡ ( y , x ) {\displaystyle \theta =\operatorname {atan2} (y,x)} is the angle measure (in radians, with − π < θ ≤ π {\displaystyle -\pi <\theta \leq \pi } ) between the positive x {\displaystyle x} -axis and the ray from the origin to the point ( x , y ) {\displaystyle (x,\,y)} in the Cartesian plane. Equivalently, atan2 ⁡ ( y , x ) {\displaystyle \operatorname {atan2} (y,x)} is the argument (also called phase or angle) of the complex number ⁠ x +...

Read on Wikipedia · Image Jacob Rus, CC BY-SA 4.0