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MathGroup Archive 2006

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Re: General--Differential equation problem..

  • To: mathgroup at
  • Subject: [mg66353] Re: General--Differential equation problem..
  • From: Heinz Spindler <heinz at mathematik.Uni-Osnabrueck.DE>
  • Date: Wed, 10 May 2006 06:34:26 -0400 (EDT)
  • Organization: Universitaet Hannover
  • References: <e3jttb$94n$>
  • Reply-to: Heinz.Spindler at mathematik.Uni-Osnabrueck.DE
  • Sender: owner-wri-mathgroup at

randomtalk at wrote:

>hello, i was trying to solve a set of differential equations needed for a school project.. However, i'm completely new to mathematica 5.0, and i have downloaded trial, here is what i inputed into the software:
>DSolve[{x'[s] == Cos[z], y'[s] == Sin[z], z'[s] == 1/r, r == 2}, {x, y, z}, s]
>returns this error: DSolve::dvnoarg: The function z appears with no arguments.
>Is there anything wrong with what i inputed? The differential equations came from this website:
>Link to the forum page for this post:
>Posted through [[postId=10212]]
>Try this:

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