Math.cosh()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The Math.cosh() static method returns the hyperbolic cosine of a number. That is,

\mathtt{\operatorname{Math.cosh}(x)} = \cosh(x) = \frac{\mathrm{e}^x + \mathrm{e}^{-x}}{2}

Try it

console.log(Math.cosh(0));
// Expected output: 1

console.log(Math.cosh(1));
// Expected output: 1.543080634815244 (approximately)

console.log(Math.cosh(-1));
// Expected output: 1.543080634815244 (approximately)

console.log(Math.cosh(2));
// Expected output: 3.7621956910836314

Syntax

Math.cosh(x)

Parameters

x: A number.

Return value

The hyperbolic cosine of x.

Description

Because cosh() is a static method of Math, you always use it as Math.cosh(), rather than as a method of a Math object you created (Math is not a constructor).

Examples

Using Math.cosh()

Math.cosh(-Infinity); // Infinity
Math.cosh(-1); // 1.5430806348152437
Math.cosh(-0); // 1
Math.cosh(0); // 1
Math.cosh(1); // 1.5430806348152437
Math.cosh(Infinity); // Infinity

Specifications

Specification
ECMAScript® 2026 Language Specification # sec-math.cosh

Browser compatibility

	Desktop					Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`cosh`	38	12	25	25	8	38	25	25	8	3.0	38	1.0	0.12.0