Evaluate the following trigonometric expressions.
a. 2 sin / 8) cos ( / 8)
b. 1 / 2 sin ( / 12) cos ( / 12)
c. 4 sin (− / 12) cos (− / 12)
d. cos2 ( / 8 ) − sin2 ( /8 )
e. 2 cos2 ( /12) − 1
f. 1 − 2 sin2 (− / 8)
g. cos2 (- 12 ) − 2
h. 2 / 8) / 1 − / 8)
i.2 tan(− / 12) / 1 − tan2(− 12)
j. cos2 / 8)
k. cos / 8)
l. cos (− / 8 )
m. sin2 ( / 12)
n. sin ( / 12)
o. sin (− / 12)
p. tan / 8)
q. tan / 12)
r. tan (− / 8 )

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

Which of the following will form the composite function?