The projection of the vector \(\hat{i}-\hat{j}\) on the vector \(\hat{i}+\hat{j}\) is
Answer & explanation
Correct answer: option 3
\(\begin{aligned}\text{Projection}&=\frac{(\hat{i}-\hat{j})\cdot (\hat{i}+\hat{j})}{|\hat{i}+\hat{j}|}\\ &=0\end{aligned}\)