Matlab code please

Create two vectors with entries evenly spaced between 0 and pi. One vector should be of length 100 and the other should be of length 1000. Then apply these vectors to the function sin(2.c). Approximate the derivative of this function by taking differences of adjacent elements and dividing by the space between them. Do this for both vectors. What function should this be? (I hope you know this...) Check this by applying the original evenly-spaced vectors to this function, taking the elementwise difference between the resulting vectors and the derivative vectors and computing the magnitudes of the max differences between them. Which length produces better results