2. The Maclaurin series expansion for the cosine is an infinite series in the form cos(x) = 1 - + 4! 6! Use MATLAB to create a plot of the built-in cos function (with a solid line) and two series expansions up to x2 and up to x term. Use the built-in factorial function, and plot in the range of x from 31 to 31 using a step size of "/64 The true value of cos(n/4) = 72/2. Find the percent true error caused by using: (a) only the first three terms, and (b) only the first five terms of the series expansion. Use the following definition: true value - approximate value percent true error = 100 true value