4. For the function f(x) = cos x, centered at a = 0: a. Find the first five nonzero terms of the Taylor Series. b. Approximate cos(-2) to four decimal places using the sum of these first five nonzero terms. c. Compare this value from part (b) to the decimal approximation of cos(-2) using the cosx button on a scientific calculator, also rounded to four decimal places (find the absolute error between these two values).

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