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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>