1 Answered Questions for the topic Calculus 3, Partial Derivative

Calculus 3, Partial Derivative

11/18/17

I dont understand how to do this partial derivative

If z=f(x,y), where x=rcosϴ and y=rsinϴ, find ∂2z/ ∂r∂ϴ.    I have the complete solution in my book but have cant understand anything.Please help !

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