Use identities to find the indicated value for each angle measure.cos 2? = - 
and 
< ? < ?
Find sin ?.
A. sin ? = 
B. sin ? = 
C. sin ? = 0
D. sin ? = - 
Answer: B
Mathematics
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Match the symbol with the answer choice that names the same set of points based on the given figure.
A. 
B. 
C. 
D. None of these
Mathematics
Evaluate the series.
A. 45 B. 66 C. 46 D. 1123
Mathematics
Solve.9r + 7 = 97
A. r = 3 B. r = 81 C. r = 10 D. r = 85
Mathematics
Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: y = 
. How many hours of study are needed to score 90?
A. 101.07 hr B. 3.26 hr C. 32.60 hr D. 7.86 hr
Mathematics