JavaScript Math.atan() Method

Math.atan()The method returns the arctangent value of a number (in radians).

The Math.atan() method returns a numeric value between -π/2 and π/2 radians.

Since atan() is a static method of Math, you always use it asMath.atan()Instead of using it as a method of the created Math object.

Syntax:

Math.atan(x)

Example

Math.atan(2);

All browsers fully support the Math.atan() method:

Method
Math.atan()	Yes	Yes	Yes	Yes	Yes

Parameter	Description
x	Number

Return value:	Inverse tangent (in radians) of a given number
JavaScript Version:	ECMAScript 1