simple-squiggle/node_modules/mathjs/docs/reference/functions/cosh.md

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# Function cosh
Calculate the hyperbolic cosine of a value,
defined as `cosh(x) = 1/2 * (exp(x) + exp(-x))`.
For matrices, the function is evaluated element wise.
## Syntax
```js
math.cosh(x)
```
### Parameters
Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; BigNumber &#124; Complex &#124; Unit &#124; Array &#124; Matrix | Function input
### Returns
Type | Description
---- | -----------
number &#124; BigNumber &#124; Complex &#124; Array &#124; Matrix | Hyperbolic cosine of x
### Throws
Type | Description
---- | -----------
## Examples
```js
math.cosh(0.5) // returns number 1.1276259652063807
```
## See also
[sinh](sinh.md),
[tanh](tanh.md)