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Re: Are two expressions equal?

• To: mathgroup at smc.vnet.net
• Subject: [mg5082] Re: Are two expressions equal?
• From: rubin at msu.edu (Paul A. Rubin)
• Date: Fri, 25 Oct 1996 22:48:39 -0400
• Organization: Michigan State University
• Sender: owner-wri-mathgroup at wolfram.com

In article <54kam8$d6r at dragonfly.wolfram.com>,
   jeremy_gorman at smtp.svl.trw.com (Jeremy Gorman) wrote:
->Hello Folks,
->
->How can I check to see if these expressions are equal?
->----------------------------
->In[25]:=
->q1 == q2
->Out[25]=
[gory trig expression == other gory trig expression deleted]
->-------------------------------
->I've tried 
->Expand[q1]==Expand[q2]
->but Mma 2.2.2 still returns an expresion with == in it.
->I could go through comparing subexpressions, but there are a few
->more of these which I'd like to compare, and I'm hoping for a 
->more general approach.
->
->Thanks in advance
->Jeremy
->
->/*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/
->Jeremy Gorman                                  "Just a Comment"
->Most of my opinions are my own (especially if expressed here) !
->/*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/ /*\ \*/

Try Expand[q1, Trig->True] == Expand[q2, Trig->True] and see if that works.

-- Paul

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* Paul A. Rubin                                  Phone: (517) 432-3509   *
* Department of Management                       Fax:   (517) 432-1111   *
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Mathematicians are like Frenchmen:  whenever you say something to them,
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entirely different.                                    J. W. v. GOETHE