Find the exact value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.Find cos ?.
A. 
B. 
C. 
D. 
Answer: A
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Simplify using only positive exponents. Leave the answer in exponential notation.x-8 ? x2 ? x-6
A. -x12
B. 
C. 
D. x96
Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P < 0 (a loss is taken).
A. t = 11 or t = 16 B. t < 11 or t > 16 C. 11 < t < 16 D. t > 0
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 45.05 sin x superimposed over a scatter diagram of the data. Find the sinusoidal function of the form 
which best fits the data.
A. y = 45.05 sin 
+ 66.25
B. y = 45.05 sin 
+ 66.25
C. y = 45.05 sin 
+ 21.20
D. y = 45.05 sin 
+ 21.20
Write an inequality that satisfies the description.Inside the circle with radius 2 and center (0, 0)
A. x2 - y2 < 4 B. x2 + y2 < 4 C. x2 + y2 > 4 D. x2 + y2 < 2