f
by
The inverse hyperbolic tangent of x.
x
This function satisfies the property that sinh(arcsinh(x)) == x. Alternatively, this function can also be computed as \(\tanh^{-1}(x) = \frac12\ln\frac{1+x}{1-x}\).
sinh(arcsinh(x)) == x
tanh – hyperbolic tangent;
tanh