1.

Let two vectors \[\vec{A}=3\hat{i}+\hat{j}+2\hat{k}\] and\[\vec{B}=2\hat{i}-2\hat{j}+4\hat{k}\]. Consider the unit vector perpendicular to both A and B is

A. \[\frac{\hat{i}-\hat{j}-\hat{k}}{\sqrt{3}}\]           
B.        \[\frac{\hat{i}-\hat{j}-\hat{k}}{2\sqrt{3}}\]
C. \[\frac{-\hat{i}-\hat{j}-\hat{k}}{\sqrt{3}}\]          
D.        \[\frac{\hat{i}-\hat{j}-\hat{k}}{2\sqrt{3}}\]
Answer» B.        \[\frac{\hat{i}-\hat{j}-\hat{k}}{2\sqrt{3}}\]


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