# [SOLVED]write ode as a system

#### dwsmith

##### Well-known member
Can this be written as a system since it only has theta?
$$U' = -\frac{mgb}{\sin^2\theta} - \frac{Mgb\cos\theta}{\sin^2\theta} = \frac{gb}{\sin^2\theta}(m - M\cos\theta).$$

#### dwsmith

##### Well-known member
Re: write ode has a system

Can this be written as a system since it only has theta?
$$U' = -\frac{mgb}{\sin^2\theta} - \frac{Mgb\cos\theta}{\sin^2\theta} = \frac{gb}{\sin^2\theta}(m - M\cos\theta).$$
I am trying to find the fixed points of this system. That is why I wanted to transform it. Can they be found in its current state?