Re: Logical evaluation
- To: mathgroup at smc.vnet.net
- Subject: [mg82326] Re: Logical evaluation
- From: Bill Rowe <readnewsciv at sbcglobal.net>
- Date: Wed, 17 Oct 2007 04:14:39 -0400 (EDT)
On 10/16/07 at 3:27 AM, mmandelberg at comcast.net (Michael Mandelberg) wrote: >I can't figure out why the following does not evaulate to TRUE: >In[100]:= \[ExponentialE]^(-\[ImaginaryI] x) + \[ExponentialE]^(\ >\[ImaginaryI] x) == 2 TrigToExp[Cos[x]] >Out[100]= \[ExponentialE]^(-\[ImaginaryI] x) + \[ExponentialE]^(\ >\[ImaginaryI] x) == >2 (\[ExponentialE]^(-\[ImaginaryI] x)/ 2 + >\[ExponentialE]^(\[ImaginaryI] x)/2) >Any ideas? Use Simplify, i.e., In[9]:= E^((-I)*x) + E^(I*x) == 2*TrigToExp[Cos[x]] // Simplify Out[9]= True Also, converting expressions to InputForm before pasting them into email makes them much more readable and easier to respond to. -- To reply via email subtract one hundred and four