cos ( 2x) 8. What is the best substitution to make to evaluate 5-2sin(2x) dx ? (2 points) O u= sin(2x) O u = cos(2x) O u = 2x O u= 5-2sin(2x) 9. Evaluate | 43* dx . (2 points) O 43x + C 6In2 O 13x + C In4 O 43x+1 3x +1 + C None of these10. Evaluate X dx . (2 points) Vx2 +16 O 1 O 2 O 3 0 4 1 /4 11. Use your calculator to evaluate [ sec(x) dx . Give 3 decimal places for your answer. If your answer is below 1, use a leading zero-for example, 0.252. (2 points) 12. Find the area under the graph of f(x) = e-2in(*) on the interval [1, 2]. (2 points) O 0.5 1.5 2.333 1.7513. Find the area of the region bounded by the graphs of y = x, y = -x + 6, and y = 0. (2 points) O 4.5 O 9 O 18 O None of these