3-d

Question: If a line makes the angle $\alpha ,\beta ,\gamma $ with three dimensional co-ordinate axes respectively, then $\cos 2\alpha +\cos 2\beta +\cos 2\gamma =$



1) – 2
2) – 1
3) 1
4) 2
Solution: Explanation: No Explanation
System of co-ordinates Direction cosines and direction ratios Projection

Rate this question:

Average rating: (0 votes)

Previous Question Next Question