Arctanh

The inverse hyperbolic tangent function

fun arctanh(number)

Parameters

• number: A dimensionless number value

Discussion

arctanh is the inverse of tanh so if arctanh(number) == x then tanh(x) == number. The returned number is in terms of radians:

arctanh(0)
arctanh(.5)

0 rad
0.55 rad

arctanh is valid where -1 < number < 1