[WP34S] DEG and RAD  diffs

06062014, 05:53 PM
Post: #26




RE: [WP34S] DEG and RAD  diffs
(06062014 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 \(y=w1\). So it's just the other way round. 

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