Question: Find the quadratic approximation P(x) = A + Bx + Cx2 to the function f(x) = cos x that satisfies conditions (i), (ii), and (iii)

Find the quadratic approximation P(x) = A + Bx + Cx2 to the function f(x) = cos x that satisfies conditions (i), (ii), and (iii) with a = 0. Graph P, f, and the linear approximation L(x) = 1 on a common screen. Comment on how well the functions P and L approximate f.

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