ATANH function
Inverse hyperbolic tangent function. ATANH(x) returns the inverse hyperbolic tangent of x. x must be in the open interval (−1, 1).
The inverse hyperbolic tangent can be expressed as a natural logarithm:
$$ \operatorname{atanh}(x) = \frac{1}{2}\ln\!\left(\frac{1+x}{1-x}\right) $$
The argument x can be a real number, a complex number, or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the ATANH function applied to all elements.
Examples
ATANH(0) equals 0
ATANH(0.5) equals 0.5493061
Calculator
Graph
Relation with ASINH and ACOSH functions
