Find the phase shift of the function.y = 4 cos 

A.
B. 4
C. -4
D. - 

Answer: D

Mathematics

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Determine whether the argument is valid or invalid by using a truth table.p ? q~ p----? ~ q 

A.
  The argument is valid.


B.
  The argument is invalid.


C.
  The argument is valid.


D.
 The argument is invalid.  


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Mathematics

Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by the x-axis and the curve y = x cos x, 0 ? x ? ?/2 about the y-axis.

A.  + 2?2 - 4?
B.  - 8? 
C.  - 4?
D.  - 4?

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Mathematics

Find y".y = 

A. - 
B. - 
C.
D. - 

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Mathematics

Solve the equation symbolically.p - p = 4

A. 32 B. -28 C. -32 D. 28

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Mathematics