The direction cosines of two lines are given by the P equation \( 3...

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The direction cosines of two lines are given by the
P equation \( 3 m+n+5 l=0,6 n l-2 l m+5 m n=0 \), then

W the direction cosines are
(1) \( \frac{1}{\sqrt{6}}, \frac{-2}{\sqrt{6}}, \frac{1}{\sqrt{6}} \)
(2) \( \frac{-1}{\sqrt{6}}, \frac{2}{\sqrt{6}}, \frac{-1}{\sqrt{6}} \)
(3) \( \frac{-1}{\sqrt{6}}, \frac{1}{\sqrt{6}}, \frac{2}{\sqrt{6}} \)
(4) \( \frac{1}{\sqrt{6}}, \frac{-1}{\sqrt{6}}, \frac{-2}{\sqrt{6}} \)
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