Re: TraditionForm Appears to be Inconsistent

*To*: mathgroup at smc.vnet.net*Subject*: [mg99562] Re: [mg99551] TraditionForm Appears to be Inconsistent*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Fri, 8 May 2009 00:14:19 -0400 (EDT)*Reply-to*: hanlonr at cox.net

It will automatically simplify some forms. Use HoldForm to stop this. TraditionalForm[Exp[I \[Theta]] == Cos[\[Theta]] + I Sin[\[Theta]]] E^(I \[Theta])\[LongEqual]cos(\[Theta])+I sin(\[Theta]) % // Simplify True TraditionalForm[HoldForm[Cos[x] == Sin[x + \[Pi]/2]]] cos(x)\[LongEqual]sin(x+\[Pi]/2) ReleaseHold[%] True Bob Hanlon On Thu, May 7, 2009 at 8:19 AM , 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