Use the sum-to-product formulas to write the given expression as a product.
?
?
?
A. ??2 sin 4? cos ?
B. ?-2 sin 4? sin ?
C. -?2 cos 4? cos ?
D. ?2 cos 4? sin ?
E. ??2 cos 4? cos ?
Answer: D
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?Which of the following is not true about triangles? ?
A. ?The sum of the interior angles of right triangles is 180?. B. ?The sum of the interior angles of an obtuse triangle is equal to the sum of the interior angles of any triangle. C. ?The angle of any triangle is equal to the sum of the other two angles. D. ?The angle of any triangle is equal to 180? - the sum of the other two angles. E. ?The equation that can be used to find a missing angle in a triangle, if the other two angles are given, is: A + (B + C) = 180?, where A is the missing angle, and B and C are given angles of the triangle.
Solve the problem.The perimeter of the quadrilateral is 54 inches. Find the lengths of the sides.
A. 9 in., 15 in., 28 in., 2 in. B. 8 in., 16 in., 28 in., 2 in. C. 10 in., 17 in., 40 in., 3 in. D. 3 in., 3 in., -2 in., -4 in.
Solve the problem.The area of the playing surface of the tennis court shown is 
square feet. If its width is 
feet, find its length.
A. (48x + 8) feet B. (6x - 8) feet C. (36x2 + 42x + 8) feet D. (6x + 8) feet
Determine whether the specified paradox occurs.A town has 13 police officers to be apportioned among 3 precincts based on the population of each precinct. The populations for the years 1998 and 1999 are given in the following table. 
Does the population paradox occur using Hamilton's method of apportionment?
A. Yes B. No