Express the sum or difference as a product.sin 9x - sin 3x
A. 2 sin 6x cos 3x
B. 2 cos 3x cos 6x
C. 2 sin 3x
D. 2 sin 3x cos 6x
Answer: D
You might also like to view...
Solve the problem.A rectangular sheet of perimeter 39 cm and dimensions x cm by y cm is to be rolled into a cylinder as shown in part (a) of the figure. What values of x and y give the largest volume?
A. x = 14 cm; y = 
cm
B. x = 12 cm; y = 
cm
C. x = 13 cm; y = 
cm
D. x = 15 cm; y = 
cm
Express the number in scientific notation.4,200,000,000,000
A. 4.2 × 1012 B. 4.2 × 10-12 C. 4.2 × 10-9 D. 4.2 × 109
Rationalize the denominator and simplify.
A. 
B. 
C. 5
D. 28
Solve the problem.A company makes 3 types of cable. Cable A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 red. They used 100 black, 110 white and 90 red wires. How many of each cable were made?
A. 20 cable A 30 cable B 10 cable C B. 10 cable A 103 cable B 20 cable C C. 10 cable A 30 cable B 20 cable C D. 10 cable A 30 cable B 93 cable C