Re: solving differential equations
- To: mathgroup at smc.vnet.net
- Subject: [mg5454] Re: [mg5386] solving differential equations
- From: Francisco Edmundo de Andrade <edmundo at lia.ufc.br>
- Date: Sat, 7 Dec 1996 00:26:32 -0500
- Sender: owner-wri-mathgroup at wolfram.com
On Thu, 5 Dec 1996, Johannes Natterer wrote:
> Hi,
>
> when solving differential equations analytically with mathematica,
> I always get the solutions in the form of complex exponential
> functions and not in the form of the equivalent trigonometric
> functions. Simplify does no good, is there any way to change that?
>
> Regards,
>
> Johannes Natterer
> --
>
> ------------------------------------------------------------------------------
> Johannes Natterer
> Institut fuer Physikalische Chemie der Universitaet Bonn
>
>
Dear Johannes,
I would solve this problem by using ComplexToTrig[expr] function that is
defined in Trigonometry package.
So, load the package:
<<Algebra`Trigonometry`
Then, use the function:
ComplexToTrig[expr]
(* Edmundo's contribuition 1996 *)
With kindest regards.
Edmundo.
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Universidade Federal do Ceara
Departamento de Computacao
B R A S I L
edmundo at lia.ufc.br
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