JavaScript(JS) math method - atan2

The atan2 method in JavaScript's Math object returns the arctangent of the quotient of its two arguments. Unlike Math.atan, Math.atan2 takes two arguments and returns the angle in radians between the positive x-axis and the point (x, y) in the Cartesian plane.

The atan2 function is defined as follows:

atan2(y, x) = arctan(y/x)

Note that atan2 takes the y coordinate as the first argument, and the x coordinate as the second argument. This is different from Math.atan, which takes a single argument.

The atan2 method takes two arguments: y and x, representing the y and x coordinates of the point, respectively. If either argument is not a number, it will be converted to one before the calculation. If x is zero, the result will be Math.PI / 2 if y is positive, -Math.PI / 2 if y is negative, and NaN if y is zero.

Here's an example usage:

const x = 1;
const y = 1;
const atan2XY = Math.atan2(y, x);
console.log(atan2XY); // 0.7853981633974483

In the above example, the arctangent of the quotient of 1 and 1 is calculated using the Math.atan2 method and assigned to the atan2XY variable. The result is then logged to the console. Note that the result is in radians. If you want the result in degrees, you can convert it by multiplying it by 180 / Math.PI.