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Re: Logical evaluation

• To: mathgroup at smc.vnet.net
• Subject: [mg82328] Re: [mg82249] Logical evaluation
• From: Syd Geraghty <sydgeraghty at mac.com>
• Date: Wed, 17 Oct 2007 04:15:41 -0400 (EDT)
• References: <200710160727.DAA08825@smc.vnet.net>

Michael,

I just evaluated both your input and output and both evaluated to True.

My System

$Version 6.0.1 for Mac OS X x86 (32 - bit) (June 19, 2007)
  $OperatingSystem MacOS X V 10.4 .10
   MacBook Pro 2.33 Ghz Intel Core 2 Duo  2GB


Have you tried a fresh  kernel. It would help if you identified your  
system and version of Mathematica.

Cheers .. Syd


Syd Geraghty B.Sc., M.Sc.
sydgeraghty at mac.com
San Jose, CA

On Oct 16, 2007, at 12:27 AM, 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?
>
> Michael Mandelberg
>
>

• References:
  • Logical evaluation
    • From: Michael Mandelberg <mmandelberg@comcast.net>