- #1
jedjj
- 26
- 0
Homework Statement
Find the indicated partial derivative.
[tex]u=e^{r\theta}\sin\theta; \frac{\partial^3u}{\partial r^2\partial\theta}[/tex]
2. The attempt at a solution
I started to derive [tex]u_{\theta}[/tex] and I attained
[tex]r*e^{r\theta}\sin\theta + e^{r\theta}\cos\theta[/tex]
But now I don't know how to take the derivative of the first equation, because there are 3 terms. It has been a few years since I have taken any math (I can assure you I won't take anymore breaks)
I just don't know where to go to attain [tex]u_{\theta r}[/tex]