A line makes equal angles with co-ordinate axis. Direction cosines of this line are
1
±(1, 1, 1)
2
\(\pm\left(\frac{1}{\sqrt{3}}, \frac{1}{\sqrt{3}}, \frac{1}{\sqrt{3}}\right)\)
3
\(\pm\left(\frac{1}{3}, \frac{1}{3}, \frac{1}{3}\right)\)
4
\(\pm\left(\frac{1}{\sqrt{3}}, \frac{-1}{\sqrt{3}}, \frac{-1}{\sqrt{3}}\right)\)