Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Logical evaluation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82315] Re: Logical evaluation
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Wed, 17 Oct 2007 04:08:56 -0400 (EDT)
  • References: <ff1pq1$91j$1@smc.vnet.net>

Hi,

because
\[ExponentialE]^(-\[ImaginaryI] x) + \[ExponentialE]^(\[ImaginaryI] \
x) == 2 TrigToExp[Cos[x]] // FullSimplify

does it.

Regards
   Jens

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
> 
> 


  • Prev by Date: Re: Is this normal for Limit?
  • Next by Date: EventHandler question
  • Previous by thread: Re: Logical evaluation
  • Next by thread: Re: Logical evaluation