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If hat(a), hat(b) and hat(c) are unit ve...

If `hat(a), hat(b) and hat(c)` are unit vector inclined to each other at an angle of `pi/3` then the absolute value of `[hat(a)+hat(b) hat(b)+hat(c) hat(c) + hat(a)]` equals

A

`sqrt2`

B

`sqrt3`

C

`3sqrt2`

D

`2sqrt3`

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The correct Answer is:
A
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