Please explain it.
Hello mr B, welcome to PF !
Please explain it is a bit short. Explain what, precisely ?
Have you made any attempt at a solution yourself? What do you think it might be and why?
I think it's 4 lines (8 rays) but there are some who are opposing me..What is the right answer?
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?
Also, are we talking about coordinate axes in two or three dimensions?
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.
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