CUET Preparation Today
The direction cosines of a line which makes equal angles with the coordinate axes are |
\(\frac{1}{2},\frac{1}{2},\frac{1}{2}\) \(\pm \frac{1}{\sqrt{3}},\pm \frac{1}{\sqrt{3}},\pm \frac{1}{\sqrt{3}}\) \(\pm \frac{1}{\sqrt{2}},\pm \frac{1}{\sqrt{2}},\pm \frac{1}{\sqrt{2}}\) \(1,1,1\) |
\(\pm \frac{1}{\sqrt{3}},\pm \frac{1}{\sqrt{3}},\pm \frac{1}{\sqrt{3}}\) |
\(\cos^2 \alpha+\cos^2 \alpha+\cos^2 \alpha=1\) |
