If the direction ratios of a line are 1,-3,2 , then the direction cosines of the line are…
Mathematics · JEE Main · NTA Exams — Three Dimensional Geometry
If the direction ratios of a line are \(1,-3,2\), then the direction cosines of the line are :
- \(\frac{1}{\sqrt{14}}, \frac{-3}{\sqrt{14}}, \frac{2}{\sqrt{14}}\)
- \(\frac{1}{\sqrt{14}}, \frac{2}{\sqrt{14}}, \frac{3}{\sqrt{14}}\)
- \(\frac{-1}{\sqrt{14}}, \frac{3}{\sqrt{14}}, \frac{-2}{\sqrt{14}}\)
- \(\frac{-1}{\sqrt{14}}, \frac{-2}{\sqrt{14}}, \frac{-3}{\sqrt{14}}\)
Answer
(A) 1 14 , -3 14 , 2 14
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