# 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 #

```
math.cosh(x)
```

### Parameters #

Parameter | Type | Description |
---|---|---|

`x` |
number | BigNumber | Complex | Unit | Array | Matrix | Function input |

### Returns #

Type | Description |
---|---|

number | BigNumber | Complex | Array | Matrix | Hyperbolic cosine of x |

## Examples #

```
math.cosh(0.5) // returns number 1.1276259652063807
```