Question: Problem 3. Using the chain rule find: dz (a) z where z = xy + y cos(x), x = ln(t2), y = sin(4t), dt

Problem 3. Using the chain rule find: dz (a) z where z

Problem 3. Using the chain rule find: dz (a) z where z = xy + y cos(x), x = ln(t2), y = sin(4t), dt z z t (b) and where z = er sin (20), r = st - t, = s + t. as

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