Express the product as a sum containing only sines or cosines.cos (4?) cos (8?)
A. cos2 (20?2)
B. 
[cos (4?) + cos (12?)]
C. 
[cos (12?) - sin (4?)]
D. 
[cos (12?) - cos (4?)]
Answer: B
Mathematics
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C. 
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A. 5
B. - 
C. -5
D. -25
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Find the quotient and the remainder.x2 + 12x + 30 divided by x + 4
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