### Definition of ATANH

Returns the inverse hyperbolic tangent of a number.

### Sample Usage

`ATANH(0.9)`

`ATANH(A1)`

### Syntax

`ATANH(value)`

`value`

- The value for which to calculate the inverse hyperbolic tangent. Must be between -1 and 1, *exclusive*.

### Notes

- Excellentable does not support imaginary or complex numbers, so these are not valid inputs or outputs from hyperbolic functions.

### By adding the values you would like to calculate, Excellentable generates the outcome:

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### See Also

`TANH`

: Returns the hyperbolic tangent of any real number.

`TAN`

: Returns the tangent of an angle provided in radians.

`SINH`

: Returns the hyperbolic sine of any real number.

`SIN`

: Returns the sine of an angle provided in radians.

`RADIANS`

: Converts an angle value in degrees to radians.

`PI`

: Returns the value of Pi to 14 decimal places.

`DEGREES`

: Converts an angle value in radians to degrees.

`COSH`

: Returns the hyperbolic cosine of any real number.

`COS`

: Returns the cosine of an angle provided in radians.

`ATAN2`

: Returns the angle between the x-axis and a line segment from the origin (0,0) to specified coordinate pair (`x`,`y`), in radians.

`ATAN`

: Returns the inverse tangent of a value, in radians.

`ASINH`

: Returns the inverse hyperbolic sine of a number.

`ASIN`

: Returns the inverse sine of a value, in radians.

`ACOSH`

: Returns the inverse hyperbolic cosine of a number.

`ACOS`

: Returns the inverse cosine of a value, in radians.