Use the half-angle formulas to determine the exact value of the given trigonometric expression.
?
?
?
A. ?
B. ?
C. ?
D. ?
?
E. ?
Answer: D
Mathematics
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Provide an appropriate response.Evaluate 
by writing the integrand as an integral.
A. ln 
B. 
C. 
D. ln 
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Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 40 mi B. 20 mi C. 6.3 mi D. 10 mi
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Estimate the value as a whole number or as a mixed numeral where the fractional part is 
.3
A. 3
B. 3
C. 5
D. 4
Mathematics
Convert from cents to dollars.86¢
A. $8.60 B. $0.86 C. $860.00 D. $0.086
Mathematics