For some reason, Mathematica will not comply when I try to determine(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

\cosh^{-1}(\sqrt{2})

[/tex]

Why is this the case? Is [tex]\cosh^{-1}(x)[/tex] undefined there or something? If so, why? I don't really see it...

Thanks!

UPDATE: Looks like Maple 11 refuses to evaluate [tex]\cosh^{-1}(\sqrt{2})[/tex] too. What is going on here?!

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# Why is Mathematica giving me fits when I try to evaluate ArcCosh[Sqrt[2]]?

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