Solving Non-linear Diff. Solving Non-linear Diff. I am a foreign student of Takuma National College of Technology, Kagawa Prefecture, Japan.
Positive theta is on the same direction with positive x.
With the conventions above, and using Lagrange's formula, the ff. system of differential equations is derived. Your problem is not so much a Maple problem as it is a mathematical problem. However, you can get numerical solutions for particular values of the parameters, or series solutions.