Subject: Integrating csch^2(x) gives an incorrect result
From: Andrey G. Grozin
Date: Sat, 25 Jun 2011 05:19:33 +0700 (NOVST)
On Fri, 24 Jun 2011, Frazer Williams wrote:
> (%i3) integrate((1/sinh(x))^2,x);
> 4
> (%o3) -------------
> - 2 x
> 2 %e - 2
>
> According to a book of tables, the integral should be
>
> -coth x
The two results differ by a constant, and therefore both are equally
correct.
Andrey