The direction cosines of a line are proportional to 2, 3, 6. The direction cosine along z-axis is:
The direction cosines of a line are proportional to 2, 3, 6. The direction cosine along z-axis is:
- A. 6/7
- B. 3/7
- C. 2/7
- D. √6/7
Answer: A) 6/7
Explanation: Magnitude = √(2²+3²+6²)=7. Hence direction cosines are 2/7, 3/7, 6/7. So z-direction cosine is 6/7.
0 Answers
Log in to post your own answer or join the discussion.
No comments yet — start the discussion.