Test Academy | Three vectors A,B and C add up to zero. Find which is false. (A×B) × C is not zero unless B,C are parallel., (A×B).C is not zero unless B,C are parallel, If A,B,C define a plane, (A×B)×C is in that plane, (A×B).C=|A| |B| |C|→ C²=A²+B²

Question

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

Options :

(A×B) × C is not zero unless B,C are parallel.
(A×B).C is not zero unless B,C are parallel
If A,B,C define a plane, (A×B)×C is in that plane
(A×B).C=|A| |B| |C|→ C²=A²+B²

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