(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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 dont 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 dont know where to go to attain [tex]u_{\theta r}[/tex]

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# Homework Help: I need to understand partial derivatives.

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