vectors

Question: Two vectors $\vec A\,{\rm{ and }}\vec B$ are such that $\vec A + \vec B = \vec A - \vec B$. Then



1) $\vec A\,.\,\vec B = 0$
2) $\vec A \times \vec B = 0$
3) $\vec A = 0$
4) $\overrightarrow B = 0$
Solution: Explanation: Explanation
addition-subtraction-vectors

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