JavaScript(JS) math method - atan

The atan method in JavaScript's Math object returns the arctangent of a number.

The arctangent function, also known as the inverse tangent function, is the inverse of the tangent function. It is defined as the angle whose tangent is the given number. The atan method returns this angle in radians.

The atan method takes one argument, which is the number whose arctangent needs to be calculated. If the argument is not a number, it will be converted to one before the calculation. If the argument is NaN or infinite, NaN will be returned.

Here's an example usage:

const x = 1;
const atanX = Math.atan(x);
console.log(atanX); // 0.7853981633974483

In the above example, the arctangent of 1 is calculated using the Math.atan method and assigned to the atanX 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.