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vec A , vec B and vec C are three non-co...

` vec A , vec B and vec C` are three non-collinear, non co-planar vectors. What can you say about direction of ` vec A xx vec (B xx vec C`) ?

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The direction of `(BxxC)` will be perpendicular to the plane containing B and B by right hand rule. `Axx(BxxC)` will lie in the plane of B and C and is perpendicular to vector A.
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