Use the product-to-sum identities to rewrite the expression as the sum or difference of two functions.cos 2? cos 4?
A. 
[cos 6? - cos 2?]
B. 
[cos 2? + cos 6?]
C. cos2 6?2
D. 
[cos 6? - sin 2?]
Answer: B
You might also like to view...
Factor the expression completely.y2 - 11y + 18
A. (y + 2)(y + 9) B. (y - 2)(y + 9) C. (y - 18)(y - 1) D. (y - 2)(y - 9)
Write the decimal as a fraction or mixed number in lowest terms.11.2
A. 
B. 1
C. 11
D. 1
Find the LCD for the set of fractions.
, 
A. 2 B. 24 C. 48 D. 14
Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 35 staff members and needs at least 20 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?
A. 8 counselors and 12 aides B. 13 counselors and 16 aides C. 19 counselors and 23 aides D. 13 counselors and 17 aides