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MathGroup Archive 2007

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Logical evaluation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82249] Logical evaluation
  • From: Michael Mandelberg <mmandelberg at comcast.net>
  • Date: Tue, 16 Oct 2007 03:27:40 -0400 (EDT)

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?

Michael Mandelberg



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