atan2 in C++ is a mathematical function that computes the arc tangent (inverse tangent) of two variables, y and x, returning the angle in radians. It is defined in the <cmath> library and is useful for converting Cartesian coordinates to polar coordinates. Unlike atan, atan2(y, x) determines the correct quadrant of the result, preventing ambiguity.

Example usage:

cpp
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#include <iostream>
#include <cmath>
More Visit- https://docs.vultr.com/cpp/standard-library/cmath/atan2