Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. - 
C. 
D. - 
Answer: C
Mathematics
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Solve the rational inequality. Express the solution using interval notation.
? 0
A. [-1, 5] ? [8, ?) B. [-1, 5) ? (8, ?) C. (-?, -1] ? (5, 8) D. (-?, -1] ? [5, 8]
Mathematics
Solve the equation.2(5 + 3x) = 
A. {3}
B. {-3}
C. {8}
D. 
Mathematics
Evaluate the expression.
A. 28 B. 22 C. 10 D. 7
Mathematics
Use the following information to fill in the blank: 
30 T = ___ tsp
A. 6 B. 10 C. 90 D. 150
Mathematics