What will be the projection of vector $A=\hat{i}+\hat{j}+\hat{k}$ on vector $\vec{B}=\hat{i}+\hat{j}$.
$\sqrt{2}(\hat{i}+\hat{j})$
$(\hat{i}+\hat{j})$
$\sqrt{2}(\hat{i}+\hat{j}+\hat{k})$
$2(\hat{i}+\hat{j}+\hat{k})$
Let $\vec{A}=2 \hat{i}-3 \hat{j}+4 \hat{k}$ and $\vec{B}=4 \hat{i}+j+2 \hat{k}$ then $|\vec{A} \times \vec{B}|$ is equal to ...................
Dot product of two mutual perpendicular vector is