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This function calculates the inverse hyperbolic tangent of a number.
ATANH(value)
[Required] For the argument, you can specify any real number between 1 and –1, excluding –1 and 1.
This function is the inverse of the hyperbolic tangent, so ATANH(TANH(n)) gives the result n.
ATANH(B5)
ATANH(R5C2)
ATANH(0.55) gives the result 0.6183813136
ATANH(-0.2) gives the result -0.2027325541