Find vector parallel to two planes

1. Feb 2, 2017

Bestphysics112

1. The problem statement, all variables and given/known data
Find unit vector(s) that are parallel to both of the planes 6x + y + z = 1 and x − y − z = 0 .

2. Relevant equations
N/A

3. The attempt at a solution
OK. So here is my reasoning - I find the normal of both the given planes and find the cross product between the vectors. The resultant vector will be parallel to both of the planes. I normalize the vector after to obtain the final answer. Is my logic correct? This is my first post on PF so I'm not sure if there is anything else I need to provide

2. Feb 2, 2017

Orodruin

Staff Emeritus
Yes.

3. Feb 2, 2017

Bestphysics112

Thanks. Is LaTeX necessary for this forum? I will probably ask some questions in the physics sections soon and was wondering what formatting is preferred. Also how do i close this thread?

4. Feb 2, 2017

Orodruin

Staff Emeritus
I would highly recommend it for more advanced maths. For simple things there is no point really. There is a short introduction on how to use it on the forum here: LaTeX Primer

You cannot close the thread. In the homework sections, you can mark a thread as solved by clicking "mark solved" in the upper right corner.