3-d

Question: If $\left( \frac{1}{2},\frac{1}{3},n \right)$ are the direction cosines of a line, then the value of n is



1) $\frac{\sqrt{23}}{6}$
2) $\frac{23}{6}$
3) $\frac{2}{3}$
4) $\frac{3}{2}$
Solution: Explanation: No Explanation
System of co-ordinates Direction cosines and direction ratios Projection

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