Let 𝐚, 𝐛 and 𝐜 be three non-zero vectors such that no two of them are collinear and (𝐚×𝐛) ×�...

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Let 𝐚, 𝐛 and 𝐜 be three non-zero vectors such that no two of them are collinear and (𝐚×𝐛) ×𝐜=1/3|𝐛||𝐜| 𝐚. If θ is the angle between vectors b and c, then a value of sinθ is
(a) 2 √(2)/3 [Single Correct Type, 2015 Adv.]
(b) -√(2)/3
(c) 2/3
(d) -2 √(3)/3

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