Question

Use the Chain Rule to find the indicated partial derivatives. u = r2 + s2 ,    r...

Use the Chain Rule to find the indicated partial derivatives.

u =

r2 + s2

,    r = y + x cos t,    s = x + y sin t

∂u
∂x

,  

∂u
∂y

,  

∂u
∂t

    when x = 2,  y = 5,  t = 0

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