Use an identity to write the expression as a single trigonometric function or as a single number.2 cos2 75° - 1
A. - 
B. - 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.A coin has a circumference of 68.14 mm. Find its radius and area. Round the radius and area to the nearest hundredth. (Use 3.14 to approximate 
A. 213.94 mm; 3644.57 mm2 B. 21.7 mm; 1478.59 mm2 C. 10.85 mm; 369.65 mm2 D. 10.85 mm; 1160.70 mm2
Mathematics
Find fraction notation.0.9696
A. 
B. 1
C. 
D. 
Mathematics
Find the exact value of the expression without using a calculator.
A. 
B. 
C. 
D. 
Mathematics
Divide.15 ÷ 3
A. 5 B. 6 C. -5 D. -4
Mathematics