Class 12MathematicsThree Dimensional GeometrySystem of co-ordinates, Direction cosines and direction ratios, Projection
EasyThe direction cosines of the supporting line of the vector $\hat{i}+\hat{j}-2 \hat{k}$ are
- A$\left(\frac{1}{\sqrt{6}}, \frac{1}{\sqrt{6}}, \frac{-2}{\sqrt{6}}\right)$
- B$\left(\frac{1}{2}, \frac{1}{2},-1\right)$
- C$\left(\frac{1}{\sqrt{6}}, \frac{1}{\sqrt{6}}, \frac{2}{\sqrt{6}}\right)$
- D$\left(\frac{-1}{2}, \frac{-1}{2},-1\right)$
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DifficultAP EAMCET 2021
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