ATANH

Syntax: ATANH(X)

X = a numeric value between -1 and 1

ATANH returns the hyperbolic arc tangent of angle X. The result is the angle (in radians) whose hyperbolic tangent is X.

Examples:

ATANH(0) = 0

ATANH(J20) = 1.127029, where J20 = 0.81

ATANH(1) = Error - ATANH, domain is -1 $<$ x $<$ 1

Excel function: ATANH