Three vectors A, B and C add upto zero. Find which is false.

1.	Three vectors A, B and C add upto zero. Find which is false.
Answer» `(vecA XX vecB) xx vecC` is not ZERO unless `vecB, vecC` are parallel. `(vecA xx vecB) * vecC` is not zero unless `vecB, vecC` are parallel. If `vecA, vecB, vecC` define a plane, `(vecA xx vecB) xx vecC` is in that plane. `(vecAxxvecB) * vecC = \|vecA\|\|vecB\|\|vecC\| TOC^(2) = A^(2) + B^(2).` Answer :C

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