# Homework Help: Basic differential equations

1. Jun 30, 2010

### pupeye11

1. The problem statement, all variables and given/known data

Determine whether the given first-order differential equation is linear in the indicated dependent variable by matching it with the first differential equations given in #7.

2. Relevant equations

#7 $$(sin \theta)y^{'''} - (cos \theta)y^{'} = 2$$

#10 $$(u)dv + (v+uv-ue^u)du = 0;$$ in v; in u

3. The attempt at a solution

How can I do this problem when there is not a variable y in number 10?

2. Jul 1, 2010