Estimate the area

Estimate the area under the graph of f(x) = 5 cos(x) from x = 0 to x - 1/2. (Round the answer to four decimal places. ) (a) Use four approximationg rectangles and right endpoints. RA Is your estimate an underestimate or an overestimate? underestimate overestimate (b) Use four approximationg rectangles and left endpoints. LA Is your estimate an underestimate or an overestimate? underestimate overestimate