Question: For the following exercises, prove the identity. Plot the points and find a function of the form y = Acos(Bx + C) + D that

For the following exercises, prove the identity.

Plot the points and find a function of the form y = Acos(Bx + C) + D that fits the given data. 

x y 0 -2 1 2 2 -2 3 2 4 -2

x y 0 -2 1 2 2 -2 3 2 4 -2 5 2

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