The ATAN2 function returns the arctangent (inverse tangent) of the given x and y coordinates. Arctangent is nothing but an angle from the x-axis to a line containing the origin (0, 0). Note: The returned angle is given between -pi and pi (in radians).
=ATAN2(X number, Y number) Whereas "X Number" is the x-coordinate point and "Y Number" is the y-coordinate point.
Let us find the arctangent value of x and y coordinates, using the ATAN2 function, with the help of the below video.