[WP-34S] DEG and RAD - diffs

[Thomas Klemm]

(06-06-2014 05:27 PM)Dieter Wrote:  Since we are talking about hyperbolic functions I assume you refer to artahn x = 1/2 ln[(1+x)/(1–x)].

Nah, I think it's formula (20) of J. S. Walther's paper:

\(\ln w = 2 \tanh^{-1}(\frac{y}{x})\) where \(x=w+1\) and \(y=w-1\).

So it's just the other way round.