Express the product as a sum containing only sines or cosines.cos (2?) cos (4?)
A. 
[cos (6?) - cos (2?)]
B. 
[cos (2?) + cos (6?)]
C. 
[cos (6?) - sin (2?)]
D. cos2 (6?2)
Answer: B
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Solve the given system of equations algebraically. x2 - 3y2 = 14x2 + 3y2 = 19
A. x = 2, y = 1; x = 2, y = -1; x = -2, y = 1; x = -2, y = -1 B. x = 1, y = 2; x = -1, y = 2; x = 1, y = -2; x = -1, y = -2 C. x = -1, y = 2; x = 1, y = -2 D. x = 2, y = 1; x = -2, y = -1
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A. 24 B. 18.85 C. 0.167 D. 6
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