NCERT Example 23 - Vector Algebra

Question: Find a unit vector perpendicular to each of (a+b) and (a-b), where a = i-hat + j-hat + k-hat and b = i-hat + 2 j-hat + 3 k-hat.

Answer: ± (-i-hat + 2 j-hat - k-hat)/sqrt(6).

Full step-by-step NCERT solution with diagrams on Something by Zero.

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