Re: Trigonometric simplification - newbe question
- To: mathgroup at smc.vnet.net
- Subject: [mg49014] Re: [mg49004] Trigonometric simplification - newbe question
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Tue, 29 Jun 2004 04:49:41 -0400 (EDT)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
Simplify[ (4*(2*a*Sin[(n*Pi)/2] - a*Sin[n*Pi]))/(n^2*Pi^2), Element[n, Integers]] (8*a*Sin[(n*Pi)/2])/(n^2*Pi^2) Bob Hanlon > > From: fedderwi at uni-bremen.de (Christensen) To: mathgroup at smc.vnet.net > Date: 2004/06/28 Mon AM 04:13:48 EDT > To: mathgroup at smc.vnet.net > Subject: [mg49014] [mg49004] Trigonometric simplification - newbe question > > Hi, > > this is a Mathematica newbe question for sure: > > Mathematica comes up with the following result: > > (4*(2*a*Sin[(n*Pi)/2] - a*Sin[n*Pi]))/(n^2*Pi^2) > > Now I have the additional assumption that n is element of > {1,2,3, ...) (and a is real) > > How do I tell Mathematica to take this into consideration and > remove the Sin[n*Pi] term? > > Thanks, > Walter > > Trigonometric simplification - newbe question > >