Use a double-angle identity to find the exact value of the expression.2 cos2 
- 1
A. 
B. - 
C. - 
D. 
Answer: B
Mathematics
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Verify the identity.
= csc x cot x
What will be an ideal response?
Mathematics
Rewrite the division as a multiplication.
A. 
? 
B. 8 ? 
C. 
? a
D. 8 ? a
Mathematics
If x = 3 cot ?, use trigonometric substitution to write 
as a trigonometric function of ?, where 
.
?
A. ?3 sec ? B. ?3 csc ? C. ?3 cos ? D. ?3 sin ? E. ?3 cot ?
Mathematics
Solve the problem.A machine can fill 1142 boxes of cereal in 0.2 hour. How many boxes of cereal can it fill per hour?
A. 3807 boxes/hour B. 1142 boxes/hour C. 5710 boxes/hour D. 228 boxes/hour
Mathematics