When using Reimann sums, which approximation is the most accurate: left, right, or midpoint?

Complete the following steps for the given function f and interval. a. For the given value of n, use sigma notation to write the left, right, and midpoint Riemann sums. Then evaluate each sum using a calculator. b. Based on the approximations found in part (a), estimate the area of the region bounded by the graph of f on the interval. f(x) = cos 2x for 0, n= 40 a. Write the left Riemann sum. 40 Σ k= 1 (Type an exact answer, using n as needed.)

Compute the mid-point sum M4: use the function values at the midpoint of the each subinterval for the height of the rectangle. Shade the rectangles. 3 2 1 0 1/2 QA3 3/2 I Which one, L4, R4, or M4 is the best estimate of the area under the graph of f, above the x-axis and from x = 0 to x = 2? Why?