Mathematics

Problem

The unit vector perpendicular to the vectors

6\hat{i} + 2\hat{j} + 3\hat{k}

and

3\hat{i} - 6\hat{j} - 2\hat{k}

, is a.

\frac{2\hat{i} - 3\hat{j} + 6\hat{k}}{7}

\frac{2\hat{i} - 3\hat{j} - 6\hat{k}}{7}

\frac{2\hat{i} + 3\hat{j} - 6\hat{k}}{7}

\frac{2\hat{i} + 3\hat{j} + 6\hat{k}}{7}