Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
If a line makes angle 60o with x-axis, 45o with y-axis and 60o with z-axis on their positive directions respectively, their direction cosines will be:
1
\(\left( {\frac{1}{2},\frac{2}{3},\frac{3}{2}} \right)\)
2
\(\left( {\frac{1}{2},\frac{{\sqrt 2 }}{3},\frac{1}{{\sqrt 3 }}} \right)\)
3
\(\left( {\frac{1}{2},\;\frac{1}{{\sqrt 2 }},\frac{{1}}{2}} \right)\)
4
More than one of the above
5
None of the above