Use the given information to find the exact value of the trigonometric function.sin ? = 
, tan ? > 0
Find cos 
.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the center of mass of the wire that lies along the curve r and has density ?.r(t) = (3t2 - 1)i + 6tk, -1 ? t ? 1; 
A. 
B. 
C. 
D. 
Mathematics
The function 
satisfies the equation of change 
. For what value of f is f increasing at the fastest rate?
?
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.If interest is compounded monthly at 7% per year for 4 years, explain how to find the number of compounding periods and the interest rate per compounding period.
What will be an ideal response?
Mathematics
Solve the problem.From the edge of a 1000-foot cliff, the angles of depression to two cars in the valley below are 21° and 28°. How far apart are the cars? Round your answers to the nearest 0.1 ft.
A. 713.4 ft B. 724.5 ft C. 714.4 ft D. 724.4 ft
Mathematics