Q11: Use the Lagrange interpolating polynomial of degree threeor less and four-digit chopping arithmetic to approximate cos 0.750using the following values. Find an error bound for theapproximation.
cos 0.698 = 0.7661 ,cos 0.733 = 0.7432 cos 0.768 = 0.7193 cos 0.803= 0.6946.
