Jessica and Matthew are running toward the point P along the straight paths that make a fixed

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Jessica and Matthew are running toward the point P along the straight paths that make a fixed angle of θ (Figure 8). Suppose that Matthew runs with velocity vmeters per second and Jessica with velocity vmeters per second. Let ƒ(x, y) be the distance from Matthew to Jessica when Matthew is x meters from P and Jessica is y meters from P.

(a) Show that f(x, y) = x + y  2xy cos 0. (b) Assume that 0 = 7/3. Use the Chain Rule to determine the rate

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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