Express the sum or difference as a product of sines and/or cosines.sin(4?) - sin(2?)
A. 2 sin(3?) cos ?
B. 2 sin ? cos(3?)
C. sin ? cos(3?)
D. sin(3?) cos ?
Answer: B
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Find the volume.Find the volume of the solid generated by revolving the region under the curve 
in the first quadrant about the y-axis.
A. 4? B. 1? C. 2? D. 2?3
Find the amount or rate of discount and the sale price after the discount. Round money answers to the nearest cent if necessary.Original price: $328 Amount of discount: $49.20
A. 15%, $278.80 B. 1.5%, $278.80 C. 16%, $278.80 D. 17%, $278.80
Solve.A 53-kg skateboarder on a 3-kg board starts coasting on level ground at 8 m/sec. Let k = 3.2 kg/sec. How long will it take the skater's speed to drop to 2 m/sec?
A. 24.26 sec B. 1.30 sec C. 22.96 sec D. -24.26 sec
Locate the point on the rectangular coordinate system.
(0,-3)
A. C B. J C. I D. G