Re: Hyperbolic function identity
- To: mathgroup at smc.vnet.net
- Subject: [mg50950] Re: Hyperbolic function identity
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 29 Sep 2004 03:15:16 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <cjasqk$ns0$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, ArcCosh[1 + z^2/2] - 2*ArcSinh[z/2] // TrigToExp // FullSimplify[#, Element[z, Reals] && z > 0] & ?? Regards Jens Carlos Felippa wrote: > > Why > > FullSimplify[ArcCosh[1+z^2/2]-2*ArcSinh[z/2],z>0]; > > does not evaluate to 0?