Use half-angle identities to find the exact value of the expression.cos 
A. 
B. 
C. 
D. 
Answer: D
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Write the converse, inverse, or contrapositive off the proposition, as indicated.If the sum of the interior angles of a geometric figure is 180 degrees, then the figure is a triangle. (contrapositive)
A. If the sum of the interior angles of a geometric figure is not 180 degrees, then the figure is not a triangle. B. If a geometric figure is not a triangle, then the sum of the interior angles is 180 degrees. C. If a geometric figure is not a triangle, then the sum of the interior angles is not 180 degrees. D. If a geometric figure is a triangle, then the sum of the interior angles is 180 degrees.
Solve the problem.The perimeter of a rectangle is 44 cm. The length is 12 cm longer than the width. What are the length and width of the rectangle?
A. Length: 22 cm; width: 10 cm B. Length: 17 cm; width: 5 cm C. Length: 23 cm; width: 11 cm D. Length: 12 cm; width: 5 cm
Find the reference angle 
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?
?
A. 
B. 
C. 
D. 
E. 
Divide.
A. 144 B. 147 R 30 C. 144 R 36 D. 147 R 5