Use the functions below to (a) express du əz əz differentiating. Then (b) evaluate and ди Əv X - 1 z = 5 tan , x = u cos

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Use the functions below to (a) express du əz əz differentiating. Then (b) evaluate and ди Əv X - 1 z = 5 tan , x = u cos v, y = usin v, (u,v) = V əz əz Express and as functions of x and y. dx ду əz (Type an exact answer.) 𐐀x and as functions of u and v both by using the Chain Rule and by expressing z directly in terms of u and v before Əv at the given point (u,v). 1) = (7.3.7)