vectors-m

Question: If the position vectors of the points A, B, C, D be $\mathbf{i}+\mathbf{j}+\mathbf{k},\,\,2\,\mathbf{i}+5\,\mathbf{j},\,\,3\,\mathbf{i}+2\,\mathbf{j}-3\mathbf{k}$and $\mathbf{i}-6\,\mathbf{j}-\mathbf{k},$ then the angle between the vectors $\overrightarrow{AB}$ and $\overrightarrow{CD}$ is



1) $\frac{\pi }{4}$
2) $\frac{\pi }{3}$
3) $\frac{\pi }{2}$
4) $\pi $
Solution: Explanation: No Explanation
Scalar Product Dot Product

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