Solve the problem.Since cos  =  and  is in the interval [0, ?], cos-1  =

A.   
B.  
C. -  
D. 4

Answer: A

Mathematics

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Without graphing the function, determine its amplitude or period as requested.y = 5 cos xFind the amplitude.

A. 8?
B.
C.
D. 5

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Find y".y = 

A. - 
B. - 
C.
D. - 

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Add or subtract. Then simplify by collecting like radical terms, if possible. Assume that no radicands were formed by raising negative numbers to even powers. + 5 + 6

A. 11
B. 28
C. 28
D. 11

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Evaluate the expression using the values given in the table.(f?g)(6)

A. 8 B. Undefined C. 0 D. 4

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