目录

JavaScript Math.atan()

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Example

let x = Math.atan(2);

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Description

The Math.atan() method returns the arctangent of a number as a value between -PI/2 and PI/2 radians.

JavaScript Tangent Methods:

The Math.tan() Method
The Math.tanh() Method
The Math.atan() Method
The Math.atan2() Method
The Math.atanh() Method

Sine and Cosine Methods:

The Math.sin() Method
The Math.cos() Method

Syntax

Math.atan( x)

Parameters

Parameter	Description
x	Required. A number.

Return Value

Type	Description
Number	-PI to PI/2. `NaN` if the number is empty or not numeric.

Related Pages:

JavaScript Math

JavaScript Numbers

JavaScript Number Reference

Browser Support

Math.atan() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes

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