Use the fundamental identities to simplify the expression.
A. cos x
B. sin2 x
C. cos2 x
D. sin x
Answer: C
Mathematics
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Evaluate.
A. 165
B. 
C. 495
D. 1980
Mathematics
Round following numbers as indicated.39.5723 (nearest thousandth)
A. 39.572 B. 39.562 C. 39.582 D. 39.5723
Mathematics
Add. Do not use a number line except as a check.- 
+ 
A. 
B. - 
C. - 
D. 
Mathematics
Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
A. 36
B. 
C. 
D. 1
Mathematics