vectors-m

Question: The value of x for which the angle between the vectors $\mathbf{a}=-\,3\mathbf{i}+x\mathbf{j}+\mathbf{k}$ and $\mathbf{b}=x\mathbf{i}+2x\mathbf{j}+\mathbf{k}$ is acute and the angle between b and x-axis lies between $\pi /2$ and $\pi $satisfy



1) $x>0$
2) $x < 0$
3) $x>1$ only
4) $x < -1$ only
Solution: Explanation: No Explanation
Scalar Product Dot Product

Rate this question:

Average rating: (0 votes)

Previous Question Next Question