1.

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

Answer»

`SQRT2`
`SQRT3`
`3sqrt2`
`2SQRT3`

ANSWER :A


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