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Re: Simplify

  • To: mathgroup at smc.vnet.net
  • Subject: [mg127669] Re: Simplify
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Tue, 14 Aug 2012 04:22:01 -0400 (EDT)
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  • Delivered-to: l-mathgroup@wolfram.com
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On 8/13/12 at 3:16 AM, news at newsfe03.iad.highwinds-media.com (news)
wrote:

>Simplify must result:

>Simplify[(1 + Sin[x] - Cos[x])/(1 + Sin[x] + Cos[x]) == Tan[x/2]]
>True

>but why instead it results:

>Simplify[(1 + Sin[x] - Cos[x]) / (1 + Sin[x] + Cox[x]) ==  Tan[x/2]]

>((Cos[x] - Cox[x])*Tan[x/2]) / (1 + Cox[x] + Sin[x]) == 0

typo-----------------------------------^

should be Cos[x] not Cox[x]. Cox[x] would be an unknown function
to Simplify which is why it fails to yield the expected result.




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