How can I prove this:(adsbygoogle = window.adsbygoogle || []).push({});

1. For all y ∈ ]-1;1[ : Arctanh y = (1/2) ln( 1+y / 1-y )

2. For all y ∈ ]-∞;-1[ U ]1;+∞[ : Arccoth y = (1/2) ln( y+1 / y-1 )

Can I solve it by using this:

Arcsinh y = ln (x+square(x^2 +1))

Arccosh y = ln (x+square (x^2 -1))

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# Homework Help: Arctanh and arccoth

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