Question

Find a unit vector perpendicular to each of the vectors $\vec{a}+\vec{b} \ and \ \vec{a}-\vec{b}, \ where \ \vec{a} =3\hat{i}+2\hat{j}+2\hat{k} \ and \ \vec{b}=\hat{i}+2\hat{j}-2\hat{k}.$

Answer 1

how to do.. help me too....