Use the product-to-sum formulas to rewrite the expression as the sum or difference of two functions.cos 3? cos 2?
A. 
cos 5? - 
cos ?
B. cos2 6?2
C. 
cos ? + 
cos 5?
D. 
cos 5? - 
sin ?
Answer: C
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Solve the problem.The sprocket assembly on a bicycle consists of a chain and two sprockets, one on the pedal and the other on the rear wheel. If the sprocket on the pedal is 
in diameter, the sprocket on the rear wheel is 
in diameter, and the rear wheel is 
in diameter, how fast is the bicycle traveling in miles per hour when the cyclist is pedaling at the rate of 
style="vertical-align: -4.0px;" /> per second? Round your answer to the nearest tenth mph. A. 4.3 mph B. 3.3 mph C. 8.3 mph D. 6.3 mph
Graph the function over a one-period interval.y = 
cos 
A. 
B. 
C. 
D. 
Factor by grouping.12(a + 6)2 + 10(a + 6) + 2
A. (4a + 26)(3a + 19) B. (4a + 25)(3a + 20) C. (4a + 2)(3a + 1) D. (4a + 8)(3a + 7)
Use the Quotient to a Power Rule to simplify. All variables are nonzero.
4
A. 
B. 
C. 
D. 