# The number of lines making equal angles with Co-ordinate axes is ??

1. Oct 5, 2015

2. Oct 5, 2015

### BvU

Hello mr B, welcome to PF !

Please explain it is a bit short. Explain what, precisely ?

3. Oct 5, 2015

### phinds

Have you made any attempt at a solution yourself? What do you think it might be and why?

4. Oct 5, 2015

### mr_bineet

I think it's 4 lines (8 rays) but there are some who are opposing me..What is the right answer?

5. Oct 5, 2015

### phinds

There is not a "right" answer, because you have not fully stated the conditions to be met. Personally, I agree w/ you but, again, it depends on the specified conditions (which you have not stated). For example, are we talking about angles from the positive x, y, and z directions or is it OK that the angle be from the negative directions?

Last edited: Oct 5, 2015
6. Oct 8, 2015

### Chandra Prayaga

Also, are we talking about coordinate axes in two or three dimensions?

7. Oct 8, 2015

### phinds

I don't think he could have possibly come up with 4 lines if it were not 3D, so I think that's inherent in his post.