The unit vector parallel to the resultant of the vectors \(\hat { i }\) + \(\hat { j }\) – \(\hat { k }\) and \(\hat { i }\) – 2\(\hat { j }\) + \(\hat { k }\) is …………
A. \(\frac{2 \hat{i}-\hat{j}+\hat{k}}{\sqrt{5}}\)
B. \(\frac{2 \hat{i}-\hat{j}}{\sqrt{5}}\)
C. \(\frac{\hat{i}-\hat{j}+\hat{k}}{\sqrt{5}}\)
D. \(\frac{2 \hat{i}+\hat{j}}{\sqrt{5}}\)
Answer:D
The unit vector parallel to the resultant of the vectors \(\hat { i }\) + \(\hat { j }\) – \(\hat { k }\) and \(\hat { i }\) – 2\(\hat { j }\) + \(\hat { k }\) is …………
A. \(\frac{2 \hat{i}-\hat{j}+\hat{k}}{\sqrt{5}}\) B. \(\frac{2 \hat{i}-\hat{j}}{\sqrt{5}}\) C. \(\frac{\hat{i}-\hat{j}+\hat{k}}{\sqrt{5}}\) D. \(\frac{2 \hat{i}+\hat{j}}{\sqrt{5}}\)