Simplification question

*To*: mathgroup at smc.vnet.net*Subject*: [mg59032] Simplification question*From*: "snoofly" <snoofly at snoofly.com>*Date*: Wed, 27 Jul 2005 01:25:00 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Can someone explain this to me please. Clear[m] Simplify[Sin[3 m Pi], Assumptions -> m \[Element] Integers] 0 Simplify[Cos[3 m Pi], Assumptions -> m \[Element] Integers] Cos[3 m \[Pi]] I'm not sure why Mathematica cannot deduce that the second simplification should be (1)^m.

**Follow-Ups**:**Re: Simplification question***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>

**Re: Simplification question***From:*Pratik Desai <pdesai1@umbc.edu>