Calculate the inverse hyperbolic tangent of a number.

`ATANH(number)`

- number - a real number between 1 and -1, not including 1 or -1

`=ATANH(0.76159416)`

This formula returns 1.00000001, which is the inverse hyperbolic tangent of 0.76159416.

`=ATANH(-0.1)`

The ATANH function also supports negative numbers. For example, this formula returns -0.100335348, which is the inverse hyperbolic tangent of -0.1.

The ATANH function calculates the inverse hyperbolic tangent of a real number between -1 and 1, excluding -1 and 1. It requires a number argument to return the result.

- The ATANH function takes a required real number argument between -1 and 1, but the argument must not be -1 or 1.
- The ATANH function returns the inverse hyperbolic tangent of the number argument.
- Note that ATANH(TANH(number)) equals number.

The ATANH function calculates the inverse hyperbolic tangent of a number.

The ATANH function takes a real number as its argument.

The real number for the ATANH function must be between 1 and -1.

No, the real number cannot be 1 or -1.

The inverse of hyperbolic tangent TANH is ATANH.

ATANH(TANH(number)) equals number because ATANH is the inverse of TANH.

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