Re: replacing expressions
- To: mathgroup at smc.vnet.net
- Subject: [mg78564] Re: replacing expressions
- From: "Constantinos" <physicist_gr at yahoo.gr>
- Date: Wed, 4 Jul 2007 05:38:26 -0400 (EDT)
- References: <f6d63b$kaf$1@smc.vnet.net> <f6da0c$2mk$1@smc.vnet.net>
"dimitris" <dimmechan at yahoo.com> wrote in message news:f6da0c$2mk$1 at smc.vnet.net... > > Constantinos : >> Hi, >> >> I got a 'complicated' expression after FullSimplify which is a function >> of t >> variable. Let's say f[t]. >> We know that x=g[t]. After some algebra (by hand) you find that >> f[t]=1/xo^2. >> Is there any way to do such simplifications by Mathematica? >> >> Thanks >> >> Constantinos > > Geia hear Kosta. > > Can you show us exactly your expression? > It will be very helpful. > > Cheers > Dimitris The expression f[t] is f[t] = a^2 (1 + Csc[(1 + 1/c^2) t] Sin[t] (-2 Cos[t/c^2] + Csc[(1 + 1/c^2) t] Sin[t])) and the expression g[t]=x is x=g[t] = -Sin[(1 + 1/c^2) t]/(a Sin[t/c^2]). When you do FullSimplify[f[t]*x^2] you get 1 which means that f[t]=1/x^2. Thanks Constantinos