Express the product as a sum containing only sines or cosines.sin(5?) cos(6?)
A. 
[sin(11?) - sin ?]
B. sin cos(30?2)
C. 
[cos(11?) + sin ?]
D. 
[cos(11?) - cos ?]
Answer: A
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Solve the problem.A conservation officer needs to know the width of a river in order to set instruments correctly for a study of pollutants in the river. From point A, the conservation officer walks 105 feet downstream and sights point B on the opposite bank to determine that ? = 50° (see figure). How wide is the river (round to the nearest foot)? 
A. 125 ft B. 80 ft C. 163 ft D. 88 ft
Provide an appropriate response.Which one of the following is a description of the graph of the solution set for the system below?16x2 + 25y2 < 400y < -4
A. Outside the ellipse and below the line B. Outside the ellipse and above the line C. Inside the ellipse and above the line D. Inside the ellipse and below the line
Find the area of the shape.
A. 68 m2 B. 75 m2 C. 60 m2 D. 61 m2
Solve the inequality. Write the solution set using interval notation and graph it.24z + 12 > 6(3z - 3)
A. (-?, -5)
B. (24, ?)
C. (-?, 24)
D. (-5, ?)