# ATANH

## Content

This function calculates the inverse hyperbolic tangent of a number.

## Syntax

`ATANH(value)`

## Arguments

For the argument, you can specify any real number between 1 and –1, excluding –1 and 1.

## Remarks

This function is the inverse of the hyperbolic tangent, so `ATANH(TANH(n))` gives the result *n*.

## Data Types

Accepts numeric data. Returns numeric data.

## Examples

`ATANH(B5)`

`ATANH(R5C2)`

`ATANH(0.55)` gives the result 0.6183813136

`ATANH(-0.2)` gives the result -0.2027325541