# atanh

Computes the inverse hyperbolic tangent.

## Syntax

* res = atanh(x)

## Input argument

* x - a numeric value

## Output argument

* res - a numeric value

## Description

**acos** computes the inverse hyperbolic tangent.

## Example

```matlab
A =  [1+2i, 2, -3];
res = atanh(A)
```

## See also

[tanh](https://github.com/Nelson-numerical-software/nelson-gitbook/blob/master/en/trigonometric_functions/tanh.html).

## History

| Version | Description     |
| ------- | --------------- |
| 1.0.0   | initial version |

## Author

Allan CORNET
