Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
Find the direction cosines of a line which makes equal angles with the coordinate axes.
1
\(\pm \frac{1}{{\sqrt 3 }}, \pm \frac{1}{{\sqrt 3 }}, \pm \frac{1}{{\sqrt 3 }}\)
2
\(\pm \frac{1}{{\sqrt 2 }}, \pm \frac{1}{{\sqrt 2 }}, \pm \frac{1}{{\sqrt 2 }}\)
3
\(+ \frac{1}{{\sqrt 3 }}, + \frac{1}{{\sqrt 3 }}, + \frac{1}{{\sqrt 3 }}\)
4
More than one of the above
5
None of the above