Express the sum or difference as a product.cos 8x - cos 4x
A. -2 cos 6x sin 2x
B. 2 cos 2x
C. -2 sin 6x sin 2x
D. 2 cos 6x cos 2x
Answer: C
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Solve the problem.Let D be the region that is bounded below by the cone 
and above by the sphere 
Set up the triple integral for the volume of D in cylindrical coordinates.
A. 
B. 
C. 
D. 
Find the indicated probability.The following contingency table shows the popular votes cast in the 1984 presidential election by region and political party. Round your answer to three decimal places.Political Party
A person who voted Democratic in the 1984 presidential election is selected at random. Find the probability that the person was from the West.
A. 0.196 B. 0.345 C. 0.187 D. 0.076
Multiply. Be sure your answer is simplified.
? 12
A. 
B. 
C. 
D. 
Answer the questionHow can the graph of f(x) = - 
be obtained from the graph of 
A. By making a horizontal shift of 4 units down B. By reflecting across the y-axis and shrinking vertically by a factor of 4 C. By reflecting across the x-axis and stretching vertically by a factor of 4 D. By reflecting across the x-axis and stretching horizontally by a factor of 4