# cosh

cosh(x)

Compute hyperbolic cosine of `x`

## Examples

In the Julia programming language, the function `cosh(x)` is used to compute the hyperbolic cosine of `x`.

``````julia> cosh(0)
1.0

julia> cosh(1)
1.5430806348152437

julia> cosh(2)
3.7621956910836314``````

Below are some common examples of its use:

1. Compute cosh for a single value:

``````julia> cosh(0.5)
1.1276259652063807``````

This example calculates the hyperbolic cosine of the value `0.5`.

2. Compute cosh for an array of values:

``````julia> x = [0.1, 0.2, 0.3];
julia> cosh(x)
3-element Array{Float64,1}:
1.0050041680558035
1.0200667556190758
1.0453385141288607``````

The `cosh` function can be applied element-wise to an array.

3. Use cosh in mathematical expressions:
``````julia> y = cosh(0.5) + cosh(1.2);
julia> y
4.930884149960785``````

The `cosh` function can be used within larger mathematical expressions.

Common mistake example:

``````julia> cosh("hello")
ERROR: MethodError: no method matching cosh(::String)``````

In this example, the `cosh` function is applied to a string, which results in a `MethodError`. It is important to provide numerical values to the `cosh` function for it to work correctly.