Find an equation for the graph.
A. y = 2 cos 
B. y = 4 cos 
C. y = 4 cos (2?x)
D. y = 2 cos (4?x)
Answer: B
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Expand the quotient by partial fractions.
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Plot the set of points on the real number line.
A. 
B. 
C. 
D. 
Evaluate.
A. 
B. 212
C. 
D. 
Consider a soldier facing in a given direction (say north). Let us denote "left face" by l, "right face" by r, "about face" by a, and "stand fast" by f. (The element f means "don't move from your present position." It does not mean "return to your original position.") Then we define 
and an operation 
middle;" /> meaning "followed by". Thus, 
means "left face" followed by "left face" and is the same as the single "about face". Does the set H and operation satisfy the commutative property?
?
Answer yes or no.
What will be an ideal response?