vectors-m

Question: A unit vector in the $xy-$plane which is perpendicular to $4\mathbf{i}-3\mathbf{j}+\mathbf{k}$ is



1) $\frac{\mathbf{i}+\mathbf{j}}{\sqrt{2}}$
2) $\frac{1}{5}(3\mathbf{i}+4\mathbf{j})$
3) $\frac{1}{5}\,(3\mathbf{i}-4\mathbf{j})$
4) None of these
Solution: Explanation: No Explanation
Scalar Product Dot Product

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