Re: Trigonometric simplification - newbe question

*To*: mathgroup at smc.vnet.net*Subject*: [mg49036] Re: [mg49004] Trigonometric simplification - newbe question*From*: DrBob <drbob at bigfoot.com>*Date*: Tue, 29 Jun 2004 04:50:15 -0400 (EDT)*References*: <200406280813.EAA04280@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

(4*(2*a*Sin[(n*Pi)/2] - a*Sin[n*Pi]))/(n^2*Pi^2); Simplify[%, {n > 0, n \[Element] Integers}] (8*a*Sin[(n*Pi)/2])/(n^2*Pi^2) Bobby On Mon, 28 Jun 2004 04:13:48 -0400 (EDT), Christensen <fedderwi at uni-bremen.de> wrote: > 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 > > -- DrBob at bigfoot.com www.eclecticdreams.net

**References**:**Trigonometric simplification - newbe question***From:*fedderwi@uni-bremen.de (Christensen)