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If r is a unit vector satisfying r xx a ...

If r is a unit vector satisfying `r xx a =b , |a|=2 and |b| = sqrt3`, the one such r =

A

`1/4[(2a+( bxx a)]`

B

`1/4[a-(2bxxa )]`

C

`1/3 [a-(b xxa)]`

D

`1/4 [a-( bxxa )]`

Text Solution

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The correct Answer is:
D
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