Express the product as a sum containing only sines or cosines.-2 sin(5?) sin ?
A. cos(6?) - cos(4?)
B. cos(7?) - cos(3?)
C. cos(7?) + cos(3?)
D. cos(6?) + cos(4?)
Answer: A
Mathematics
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In which of the following functional areas is it NOT possible for a firm to realize economies of scale?
A. manufacturing B. marketing C. purchasing D. economies of scale are possible in all of these functional areas
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Use the square root property to solve the equation.(9s + 6)2 = 16
A. - 
, - 
B. - 
, 0
C. 
D. 
, 
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Multiply.(xy4- x3y)2
A. x2y8 - x6y2 B. x2y8 - 2x4y5 + x9y2 C. x2y8 -2 x3y4 + x6y2 D. x2y8 - 2x4y5 + x6y2
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Insert < or > to write a true statement.-7 
-4
A. -7 < -4 B. -7 > -4
Mathematics