Rewrite the trigonometric expression as an algebraic expression involving the variable u. Assume that 
and that the value of the "inner" inverse trigonometric expression represents an angle ? such that 
cos (tan-1 u)
A. 
B. 
C. u
D. 
Answer: D
Mathematics
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Use the ratio test to determine if the series converges or diverges.
A. Diverges B. Converges
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Decide whether the statement is true or false.The equation of a semicircle that is the upper half of the circle centered at the origin with radius 4 is 
.
A. True B. False
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Find the quotient using long division.
A. x2 - x - 12 + 
B. x2 + 5x + 4 + 
C. x2 - 5x - 4 + 
D. x2 - 5x + 4 - 
Mathematics
Determine if the sequence is arithmetic. If the sequence is arithmetic, find the common difference.a1 = -8, an = an - 1 + 2
A. no B. yes, -8 C. yes, 1 D. yes, 2
Mathematics