2.) use a calculator and find to 4 decimal places the value of the trigonometric function using the given identity.
2u = 82°, sin 2u = 2 sin u cos u
a.) 0.9992

b.) 0.9729

c.) 0.9903

d.) 0.0792

e.) 0.9927

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6