Solve the equation by factoring.(x + 5)(x + 1) = 21
A. {-2, 8}
B. {-5, -1}
C. {-8, 2}
D. {1, 5}
Answer: C
Mathematics
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cos (?x), 0 ? x ? 4 
A. 
B. 
C. 
D. 
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Write the first four terms of the sequence.an = 
A. 
, - 
, 
, - 
B. - 
, 
, - 
, 
C. - 
, 
, - 
, 
D. 
, - 
, 
, - 
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Use the given values to evaluate (if possible) two trigonometric functions 
and 
.
?
?
A. ?
?
B. ?
?
C. ?
?
D. ?
?
E. ?
?
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