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Let bar(a), bar(b) and bar(c) be three n...

Let `bar(a), bar(b)` and `bar(c)` be three non- zero vectors such that no two of them are collinear and `(bar(a)timesbar(b))timesbar(c)=(1)/(3)|bar(b)||bar(c)|bar(a)` if ` theta ` is angle between vectors `bar(b) ` and `bar(c)` then the value of `sin theta` is

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