Re: Simplify

• To: mathgroup at smc.vnet.net
• Subject: [mg127679] Re: Simplify
• From: Sseziwa Mukasa <mukasa at gmail.com>
• Date: Tue, 14 Aug 2012 04:25:22 -0400 (EDT)
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• References: <20120813071655.89CE16791@smc.vnet.net>

```You have to help it out by specifying the interval of interest:

(Debug) In[11]:= Simplify[(1 + Sin[x] - Cos[x])/(1 + Sin[x] + Cos[x]) ==
Tan[x/2], {-=CF=80/2 < x < =CF=80/2}]
(Debug) Out[11]= True

You'd have to handle the limits at x = =CF=80/2 separately.

Regards,
Sseziwa

On Aug 13, 2012, at 3:16 AM, news 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