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TraditionForm Appears to be Inconsistent

• To: mathgroup at smc.vnet.net
• Subject: [mg99551] TraditionForm Appears to be Inconsistent
• From: uk.org.microserf at googlemail.com
• Date: Thu, 7 May 2009 06:40:13 -0400 (EDT)

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

• Follow-Ups:
  • Re: TraditionForm Appears to be Inconsistent
    • From: Murray Eisenberg <murray@math.umass.edu>
  • Re: TraditionForm Appears to be Inconsistent
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>