Decide whether or not the given equation is an identity.cos2 y + 1 = 2 cos2 y + sin2 y
A. Yes
B. No
Answer: A
Mathematics
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Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 
D. 
Mathematics
Write the number in scientific notation.0.0000004
A. 4 × 106 B. 4 × 10-6 C. 4 × 107 D. 4 × 10-7
Mathematics
Determine whether the given series converges or diverges, and find the sum if it converges.30 + 5 + 
+ 
+ . . .
A. Converges; sum = 37 B. Converges; sum = 35.5 C. Converges; sum = 40 D. Converges; sum = 36
Mathematics
?Which of the following is the best estimate of the product: 7
× 7.
?
A.
?49
B.
?64
C.
?56
D.
?
E.
?57
Mathematics