# Math Help - Phase trajectory.

1. ## Phase trajectory.

du/dt = uv dv/dt = u
find general solution to du/dv
find phase trajectory of (u,v) passing through (1,0) when t=0
find v(t) on this phase trajectory

thanks for any help

2. Originally Posted by hmmmm
du/dt = uv dv/dt = u
find general solution to du/dv
find phase trajectory of (u,v) passing through (1,0) when t=0
find v(t) on this phase trajectory

thanks for any help
$\frac{du}{dt}=uv. \frac{dv}{dt}=u$

Now, simply use $\frac{du}{dv}=\frac{\frac{du}{dt}}{\frac{dv}{dt}}$ to obtain dv/dt.

If you need more help let me know.

3. thanks, i think i've got the first three parts but im not too sure what its asking when it asks find v(t) on this phase trajectory, thanks for the help