Find the exact value by using a sum or difference identity.cos 285°
A. 
B. -
(
- 1)
C. - 
D. -
(
+ 1)
Answer: A
Mathematics
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Find the area of the region specified in polar coordinates.the region enclosed by the curve r = 3 cos 3?
A. 
?
B. 
?
C. 
?
D. 
?
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Decide if the situation is a permutation or a combination and then answer the question.A musician plans to perform 3 selections. In how many ways can she arrange the musical selections?
A. Permutation; 6 B. Permutation; 18 C. Combination; 9 D. Combination; 3
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Predict the general, or nth term, an, of the sequence.
, 
, 
, 
, 
, . . .
A. 
B. 
C. 
D. 
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Solve the problem.Determine the domain of the function f(x) = log5(x + 2).
Fill in the blank(s) with the appropriate word(s).
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