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Let veca,vecb and vecc be non-zero vecto...

Let `veca,vecb` and `vecc` be non-zero vectors such that no two are collinear and
`(vecaxxvecb)xxvecc=1/3|vecb||vecc|veca`
If `theta` is the acute angle between the vectors `vecb` and `vecc` then `sin theta` equals

A

`(2sqrt2)/3`

B

`(sqrt2)/3`

C

`2/3`

D

`1/3`

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A
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