Home › CBSE Class 12 (Commerce) › Mathematics › Vector Algebra › Each direction cosine of the vector i + j + k eq…
Each direction cosine of the vector i + j + k equals
A1/√3
B1/√2
C1/3
D1/2
Answer & Solution
Correct answer: A. 1/√3
The magnitude is √3, so every direction cosine is 1 divided by √3.
Related questions
If a · b equals |a||b| for nonzero vectors, the angle between them isThe triangle with vertices (1, 0, 0), (0, 1, 0) and (0, 0, 1) has areaUnit vectors a and b satisfy |a + b| = 1. The angle between them isTwo perpendicular vectors have magnitudes 6 and 8. The magnitude of their sum isIf xi + 3j − k equals 2i + yj + zk, then x + y + z isThe vectors 2i + 4j − 6k and i + 2j − 3k areThe direction cosines of 2i − 3j + 6k areThe scalar triple product of three vectors gives the volume of a