# ATANH

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## 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 resultlt 0.6183813136
`ATANH(-0.2)` gives the result -0.2027325541

## Version Available

This function is available in product version 1.0 or later.

## See Also

[ACOSH](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionACOSH) \| [ASINH](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionASINH) \| [ATAN](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionATAN) \| [TAN](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsTtoZ/FunctionTAN) \| [Math and Trigonometry Functions](/spreadnet/docs/latest/online-formula/formulas-overview/formulas-functs/formulas-functtypes/formulas-functsmathtrig)