Write the sum or difference as a product containing only sines and/or cosines.cos 
+ cos 
A. 2 sin(4?) sin ?
B. 2 cos(4?) cos 
C. 2 sin(4?) sin 
D. 2 cos(4?)
Answer: B
You might also like to view...
Find the indicated probability.A sample of 4 different calculators is randomly selected from a group containing 10 that are defective and 37 that have no defects. What is the probability that at least one of the 4 calculators in the sample is defective?
A. 0.630 B. 0.616 C. 0.100 D. 0.370
Add.31,763 + 30,327
A. 57,091 B. 72,090 C. 52,090 D. 62,090
Graph the equation.(x - 1)2 = 7(y - 2)
A. 
B. 
C. 
D. 
An inferior product with a large advertising budget sells well when it is introduced, but sales fall as people discontinue use of the product. Suppose that the weekly salesSare given by 
whereSis in millions of dollars andtis in weeks. After how many weeks will sales be maximized?
?
A. two weeks B. one week C. ?three weeks D. ?four weeks E. ?five weeks