The ATANH function returns the inverse hyperbolic tangent of a number. Number must be between -1 and 1 (excluding -1 and 1). The inverse hyperbolic tangent is the value whose hyperbolic tangent is number, so ATANH(TANH(number)) equals number.

ATANH takes 1 required argument and no optional arguments:

Syntax: ATANH(number)

#1)
Using the ATANH function:
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The arguments for the ATANH function are:
Argument Required? Description
number Required Any real number between 1 and -1.

Summary

The ATANH function returns the inverse hyperbolic tangent of a number. Number must be between -1 and 1 (excluding -1 and 1). The inverse hyperbolic tangent is the value whose hyperbolic tangent is number, so ATANH(TANH(number)) equals number.
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