Trigonometric simplification

*To*: mathgroup at smc.vnet.net*Subject*: [mg68838] Trigonometric simplification*From*: carlos at colorado.edu*Date*: Mon, 21 Aug 2006 03:27:32 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

As an intermediate result of some calculations I have the expression r=Tan[a]^2/(Sec[a]^2)^(3/2) where a is real. How can I coerce Mathematica into simplifying that to r=Cos[a]*Sin[a]^2 Both Simplify and FullSimplify with assumptions on a fail to get the simpler form.

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