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Re: TraditionForm Appears to be Inconsistent

  • To: mathgroup at smc.vnet.net
  • Subject: [mg99597] Re: [mg99551] TraditionForm Appears to be Inconsistent
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Fri, 8 May 2009 00:20:45 -0400 (EDT)
  • References: <200905071040.GAA19666@smc.vnet.net>

Because Mathematica always automatically evaluates the second equality 

to True but not the first one (you need to apply Simplify in the first 

case). Hence to get the result you want you have to use:

TraditionalForm[HoldForm[Cos[x] == Sin[x + =CF=80/2]]]

Andrzej Kozlowski


On 7 May 2009, at 19:40, uk.org.microserf at googlemail.com wrote:

> Hi
>
> The Mathematica 7 documentation says that
>
> TraditionalForm[Exp[I \[Theta]] == Cos[\[Theta]] + I Sin[\[Theta]]]
>
> will display the expression in traditional form, and indeed it does.
> However, the following evaluates the expression and then displays True
> in traditional form:
>
> TraditionalForm[Cos[x] == Sin[x + \[Pi]/2]]
>
> Why is TraditionalForm behaving differently in these two apparently
> identical situations, and how can I get Mathematica to display this
> trigonometric identity in traditional form?
>
> Thanks in advance
>
> Chris
>



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