Question

The unit vectors orthogonal to the vector$-\hat{i}+2\hat{j}+2\hat{k}$ and making equal angles with the x and y axis is (are)

• A. $\pm\frac{1}{3}(2\hat{i}+2\hat{j}-\hat{k})$
• B. $\pm\frac{1}{3}(\hat{i}+\hat{j}-\hat{k})$
• C. $\pm\frac{1}{3}(2\hat{i}-2\hat{j}-2\hat{k})$
• D. $\pm\frac{1}{3}(\hat{i}-2\hat{j}-2\hat{k})$

Answer 1

Answer: (A)

$\pm\frac{1}{3}(2\hat{i}+2\hat{j}-\hat{k})$

Answer 2

The correct answer is(A): $\pm\frac{1}{3}(2\hat{i}+2\hat{j}-\hat{k})$