Develop a well-structured program to compute the Maclaurin

series expansion for the cosine function cos (pi/3)

The function should have the following features:

? Iterate until the relative error falls below a stopping

criterion (es) or exceeds a maximum number of iterations

(maxit). Allow the user to specify values for these

parameters.

? Include default values of es (= 0.000001) and maxit (=100)

in the event that they are not specified by the user.

? Return the estimate of cos(x), the approximate relative

error, the number of iterations, and the true relative error

(that you can cal-culate based on the built-in cosine

function).