Write the sum or difference as a product containing only sines and/or cosines.cos(2?) - cos(4?)
A. -2 sin(3?) sin ?
B. 2 sin(3?) sin ?
C. -2 cos(3?) sin ?
D. cos(-2?)
Answer: B
Mathematics
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Add. 15
+ 
A. 15
B. 14
C. 13
D. 14
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Solve the problem.How many players are there in the weighted voting system 
?
A. 10 B. 36 C. 38 D. 9 E. none of these
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Solve the logarithmic equation.log4(x + 3) = 3
A. {67} B. {84} C. {78} D. {61}
Mathematics
Write the expression without parentheses.-(-2v - 4r)
A. -2v - 4r B. -2v + 4r C. 2v - 4r D. 2v + 4r
Mathematics