Write the sum or difference as a product containing only sines and/or cosines.cos(2?) - cos(4?)
A. cos(-2?)
B. 2 sin(3?) sin ?
C. -2 sin(3?) sin ?
D. -2 cos(3?) sin ?
Answer: B
You might also like to view...
Solve the problem.Jill is 14 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2 kilometers per hour. They meet in 4 hours. How fast is Joe walking?
A. 1.5 kilometers per hour B. 2 kilometers per hour C. 3.5 kilometers per hour D. 2.5 kilometers per hour
Use unit ratios or conversion factors to change to the units indicated. Round to the nearest tenth, if necessary.6 m to yards
A. 1.8 yd B. 5.5 yd C. 19.7 yd D. 6.5 yd
Write the decimal as a fraction or mixed number in lowest terms.1.01
A. 
B. 
C. 
D. 1
Solve the problem.The table shows the population of a city over the past five years.
We used these data to develop the quadratic equation 
, which models the population of the city y in millions in the year x, where x = 0 represents 1995, x = 1 represents 1996, and so on. Use the model to find the estimated population in the year 1998.
A. 68,852,000 B. 1,490,000,000,000 C. 1,490,000 D. 71,628,000