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Re: Simplify

• To: mathgroup at smc.vnet.net
• Subject: [mg127666] Re: Simplify
• From: Andrzej Kozlowski <akozlowski at gmail.com>
• Date: Tue, 14 Aug 2012 04:21:01 -0400 (EDT)
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• References: <20120813071655.89CE16791@smc.vnet.net>

Well, let's see. Define:

Cox[y_] := Cos[y]

and then miraculously you will get:

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

True

Andrzej Kozlowski

On 13 Aug 2012, at 09:16, "news" <news at newsfe03.iad.highwinds-media.com> wrote:

> Hi folks,
>
> 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
>
> Thanks.
>
> Max.
>

• References:
  • Simplify
    • From: "news" <news@newsfe03.iad.highwinds-media.com>