Complete the identity.sin 
= ?
A. -sin x
B. sin x
C. cos x
D. -cos x
Answer: D
Mathematics
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Find the area of the specified region.Inside the cardioid r = ?(1 + sin ?), ? > 0
A. 
- 2?2
B. 2??
C. 
D. 
+ 2?2
Mathematics
Solve the problem.The area of a square is 81 square centimeters. If the same amount is added to one dimension and removed from the other, the resulting rectangle has an area 9 square centimeters less than the area of the square. How much is added and subtracted?
A. 12 cm B. 3 cm C. 4 cm D. 9 cm
Mathematics
Find all solutions of the following equation in the interval [0, 2?).
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Find the horizontal asymptote, if any, of the rational function.f(x) = 
A. y = 1 B. y = 0 C. y = -1 D. None
Mathematics