Three-Dimensional-Geometry Question 426

Question: If a line lies in the octant $ OXYZ $ and it makes equal angles with the axes, then

[MP PET 2001]

Options:

A) $ l=m=n=\frac{1}{\sqrt{3}} $

B) $ l=m=n=\pm \frac{1}{\sqrt{3}} $

C) $ l=m=n=-\frac{1}{\sqrt{3}} $

D) $ l=m=n=\pm \frac{1}{\sqrt{2}} $

Show Answer

Answer:

Correct Answer: B

Solution:

It is obvious.