Math.cosh()

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

๐™ผ๐šŠ๐š๐š‘.๐šŒ๐š˜๐šœ๐š‘ ( ๐šก ) = cosh ( x ) = e x + e โˆ’ x 2 \mathtt{\operatorname{Math.cosh}(x)} = \cosh(x) = \frac{\mathrm{e}^x + \mathrm{e}^{-x}}{2}

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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 Language Specification
# sec-math.cosh

Browser compatibility

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See also