Determine the first non-trivial root of cos(x) - x2 first root greater than 0.0 (Note x is in radians) a) Graphically using Matlab or Excel b) By calculator (as in a test) using three iterations of the bisection method, with intial guesses of x = 0.6, Xu = 1.5, and c) By calculator using three iterations of the false-position method, with the same initial guesses as in