General--Differential equation problem..

*To*: mathgroup at smc.vnet.net*Subject*: [mg66284] General--Differential equation problem..*From*: randomtalk at gmail.com*Date*: Sun, 7 May 2006 00:42:46 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

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: In[2]:= 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: http://fy.chalmers.se/LISEBERG/eng/loop_pe.html Link to the forum page for this post: http://www.mathematica-users.org/webMathematica/wiki/wiki.jsp?pageName=Special:Forum_ViewTopic&pid=10212#p10212 Posted through http://www.mathematica-users.org [[postId=10212]]