# Vector tutorial suggestion

• June 12th 2010, 10:00 AM
trojsi
Vector tutorial suggestion
Hi I have this problem (attached) and I really need some brush up on vectors. Can you suggest a link for some good notes or tutorials that tackles part b) and c) .

thanks

Brandon
• June 16th 2010, 11:05 AM
running-gag
Hi

2 lines are perpendicular if their direction vector are perpendicular (dot product equal to 0)

2 lines intersect if you can find one value for $\lambda$ and one for $\mu$ such that the coordinates are equal

l1 and l2 intersect and are perpendicular ; in the plane formed by l1 and l2 place A, P and B