If f x 3 cos x Find the width of each subinterval T 8 x2 3 Find the left endpoints of the subintervals where x x x6 x1 0 4 in x6 7 8 KA KIN 3 3x 8 31 4 units 5x 2 0sxs evaluate the left Riemann sum with n 6 taking the sample points to be left endpoints Evaluate the Riemann sum Round your answer to six decimal places 3 0995 What does the Riemann sum represent The Riemann sum represents the net area of the rectangles with respect to the x axis Illustrate with a diagram y 3x 3 3x 5A 8 3x 4 1 00 214 3x 8