Use half-angle identities to find the exact value of the expression.cos 
A. 
B. 
C. 
D. 
Answer: C
You might also like to view...
Find the area A. Round the answer to three decimal places.
A. 1.333 cm2 B. 4.189 cm2 C. 2.094 cm2 D. 1.047 cm2
Use a Factoring Formula to factor the expression.  figure 1.png)
 figure 2.png)
Solve the problem.An airline with two types of airplanes, P1 and P2, has contracted with a tour group to provide transportation for a minimum of 400 first class, 750 tourist class, and 1500 economy class passengers. For a certain trip, airplane P1 costs $10,000 to operate and can accommodate 20 first class, 50 tourist class, and 110 economy class passengers. Airplane P2 costs $8500 to operate and can accommodate 18 first class, 30 tourist class, and 44 economy class passengers. How many of each type of airplane should be used in order to minimize the operating cost?
A. 11 P1 planes and 7 P2 planes
B.
| 9 P1 planes and 13 P2 planes |
C. 7 P1 planes and 11 P2 planes
D. 5 P1 planes and 17 P2 planes
Solve the problem.Maximize Q = xy, where x and y are positive numbers, such that 
A. x = 
, y = 
B. x = 
, y = 
C. x = 
, y = 
D. x = 
, y = 