vectors-m

Question: If the position vectors of A and B are $\mathbf{i}+3\mathbf{j}-7\mathbf{k}$ and $5\mathbf{i}-2\mathbf{j}+4\mathbf{k},$ then the direction cosine of $\overrightarrow{AB}$ along y-axis is



1) $\frac{4}{\sqrt{162}}$
2) $-\frac{5}{\sqrt{162}}$
3) – 5
4) 11
Solution: Explanation: No Explanation
Modulus of vector Algebra of vectors

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