Express the sum or difference as a product of sines and/or cosines.cos 
+ cos 
A. 2 sin (2?) sin 
B. 2 cos (2?) cos 
C. 2 cos (2?)
D. 2 sin (2?) sin ?
Answer: B
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Solve the differential equation.cos x 
+ y sin x = sin x cos x
A. y = sin x ln |sec x| + C sin x B. y = cos x ln |sec x| + C cos x C. y = cos x ln |sec x + tan x| + C cos x D. y = cot x + C cos x
For an election with four candidates (A, B, C, and D) we have the following preference schedule:
Using the plurality-with-elimination method, which candidate is eliminated second?
A. A B. B C. C D. D E. none of these
Find a system of inequalities with the given graph.
A. y ? -x + 7 y ? 0 x ? 0 x ? 3 B. y ? -x + 7 y ? 0 x ? 0 x ? 3 C. y ? -x + 3 y ? 0 x ? 0 x ? 7 D. y ? -x + 7 x ? 3
Simplify the expression so that no negative exponents appear in the final result. Assume all variables represent nonzero numbers.
A. 
B. 
C. 
D. 