ATANH()
Syntax. ATANH(number)
Definition. This function returns the inverse hyperbolic tangent of a number (see Figure 16-9). The number must be between –1 and 1.
Argument
number (required) Any real number between –1 and 1
Background. The inverse hyperbolic functions are the inverse functions of the hyperbolic functions. The formula for the inverse hyperbolic tangent is:
Note
Inverse hyperbolic functions have the prefix ar in the same way that the inverse trigonometric functions have the prefix arc.
Figure 16-9. The function is odd and is defined only for ...
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