Re: Abs help
- To: mathgroup at smc.vnet.net
- Subject: [mg42040] Re: Abs help
- From: rex_chaos at 21cn.com (Rex_chaos)
- Date: Tue, 17 Jun 2003 05:43:19 -0400 (EDT)
- References: <bc7on7$6bt$1@smc.vnet.net> <bcjt2o$h8a$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Jens-Peer Kuska <kuska at informatik.uni-leipzig.de> wrote in message news:<bcjt2o$h8a$1 at smc.vnet.net>... > Hi, > > FullSimplify[Abs[ExpToTrig[y]]^2, Element[x, Reals]] > > Regards > Jens Thanks for your reply. This is a good answer to the question. However, I found this way is very slow when I take a = Exp[I*z]; b = Exp[-I*z] y = (a*Exp[2*x]+b*Exp[-2*x])/(b*Exp[2*x]+a*Exp[-2*x])^2 here x, z is real