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Let the vectors a and b be such that |a|...

Let the vectors a and b be such that `|a|=3 and |b|=(sqrt(2))/(3)`, then `axxb` is a unit vector, if the angle between a and b is

A

`(pi)/(6)`

B

`(pi)/(4)`

C

`(pi)/(3)`

D

`(pi)/(2)`.

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