The direction cosines of the line joining the points ( - 2 , 4 , - 5 ) and ( 1 , 2 , 3 ) are

1. $\left(\frac{3}{\sqrt{77}},\frac{-2}{\sqrt{77}},\frac{8}{\sqrt{77}}\right)$
2. $\left(\frac{3}{\sqrt{77}},\frac{2}{\sqrt{77}},\frac{8}{\sqrt{77}}\right)$
3. $\left(1,0,0\right)$
4. $\left(\frac{-3}{77},\frac{-2}{77},\frac{8}{77}\right)$

Solution

Asked in: AP EAMCET 2021 (20 Aug Shift 2)

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