Problem 6 (4 points) Assume that your computer (or calculator) cannot compute the cosine function, and that you need to approximate cos(7/6). (a) (1 point) We know that cos(0) = 1, cos(7/4) = V2/2, and cos(7/2) = 0. Using this information, calculate an approximation for cos(1/6). Do not use Matlab's polyfit. (b) (2 points) Derive a bound for the error in this approximation. How does it compare to the actual error? (c) (1 point) Without calculating the value for cos(1/6), determine how accurate your ap- proximation is