[docs] [issue21902] Docstring of math.acosh, asinh, and atanh

Kevin Davies report at bugs.python.org
Sat Jul 5 06:47:54 CEST 2014

Kevin Davies added the comment:

I'm not sure what the resolution is (the patch was 'inverse', Mark said 
he'd be happy to use 'area', and Raymond quoted 'arc').  I didn't know 
this would be a big deal, and I'm sorry that I caused trouble.  But 
since one of the concerns was divergence, I thought I'd send some info 
on how the tools I've used describe it -- universally as 'inverse' in 
those that I found:

- Mathematica: ArcCosh[z] "gives the inverse hyperbolic cosine [...]" 
- Modelica Standard Library: acosh "Inverse of cosh (area hyperbolic 
- Maple: arccosh, but unknown description 
- MATLAB: acosh " Inverse hyperbolic cosine" 
- TI-89 calculator: cosh-1 "returns the inverse hyperbolic cosine [...]" 
(from manual)



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