The Law of Cosines states that e? = a + b? – 2abcos 0, where a, b, c are the sides of a triangle and 0 is the angle opposite the side of length c. Compute ., and using implicit differentiation. (Use symbolic notation and fractions where needed.) да ab de Suppose that a = 5, b = 7,c = 11. Estimate the change in Ø if a and b are increased by I and e is increased by 2. (Use decimal notation. Give your answer to two decimal places.)

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