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Re: Solving a simple equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg121848] Re: Solving a simple equation
  • From: Peter Pein <petsie at dordos.net>
  • Date: Wed, 5 Oct 2011 03:59:07 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <j6e675$kds$1@smc.vnet.net>

Am 04.10.2011 07:39, schrieb Daniel Kallfaß:
> Hi there, I wonder why the following equation cannot be solved:
>
> \[Kappa] = 1.4
> \[CapitalTheta] = 10;
> NSolve[Tan[\[Theta] degree] ==
>    2*Cot[\[Beta] degree]*(ma1^2*Sin[\[Beta] degree]^2 - 1)/(
>     ma1^2*(\[Kappa] + Cos[2 \[Beta] degree]) + 2), \[Beta]]
>
> It says: NSolve::nsmet: This system cannot be solved with the methods
> available to NSolve.
>
> Is there something I'm missing? My Voyage 200 solves it without any
> issues.
>
> Thanks,
> Daniel
>

Hi Daniel,

I saved a notebook [1] in the w³. It uses Reduce and/or FindRoot to get 
one or more of the solutions.

Peter

[1] http://dl.dropbox.com/u/3030567/Mathematica/DanielsGleichung.nb





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