Use the given information to find the exact value of the trigonometric function.sin ? = 
; tan ? > 0
Find cos 
.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 
, 0 ? y ? 
, x = 0
A. 
B. 
C. 8?
D. 16?
Mathematics
Use an identity to write the expression as a single trigonometric function or as a single number. 2 cos2 
- 1
A. - cos
B. cos
C. - cos
D. cos
Mathematics
Solve the problem.The value of a stock is given by the function 
where V is the value of the stock after time t, in months. When will the value of the stock be 
?
A. 1.3 months B. 0.5 months C. 0.8 months D. 2.3 months
Mathematics
Simplify the complex fraction using Method 1.
A. 6s + 3t
B. 
C. 3s + 6t
D. 
Mathematics