Find a unit vector that has the same direction as the given vector.u = 

A.
B.
C.
D.

Answer: A

Mathematics

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A. 8x +  +  + . . .
B. 1 +  +  + . . .
C. 2 +  +  + . . .
D. 2 + 8x +  +  + . . .

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Solve, finding all solutions in [0, 2?).4 sin2x = 4 cos x + 1

A. , 
B. No solution
C. , 
D. , 

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Convert to rectangular coordinates. Use exact values. ? ?

A.
B. ?
C.
D.
E.

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Find the curl of the vector field.

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