defence exam Agniveer Army Technical Mock Test Series 2025 Mathematics Vector Algebra Magnitude and Directions of a Vector
Find the direction cosines of the vector î + 2ĵ - k̂.
1
\(\frac{1}{\sqrt 6}, \frac{2}{\sqrt 6}, \frac{-1}{\sqrt 6}\)
2
\(\frac{1}{\sqrt 4}, \frac{2}{\sqrt 4}, \frac{-1}{\sqrt 4}\)
3
\(\frac{-1}{\sqrt 4}, \frac{-2}{\sqrt 4}, \frac{1}{\sqrt 4}\)
4
None of these.