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
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Simple interest on a $1,250,000, 9%, 15-month note is
A. $ 90,000. B. $112,500. C. $140,625. D. $168,750.
Solve the equation for the unknown.x2 - 6 = 30
A. x = 5 B. x = 6 C. x = ± 5 D. x = ± 6
Write the indicated term of the given sequence. (ak) = 7(3k); a2
A. 567 B. 21 C. 63 D. 189
Complete the identity.sin (4?) sin (7?) cos (4?) cos (7?) = ?
A. cos2 (56?)
B. 
C. 
D. 