[Solved! Thanks Tim!] Need help with vectors question 1. The problem statement, all variables and given/known data The line L has cartesian equations x-2 = (y-5)/2 = -z. Find the perpendicular distance from the origin to L. Find also the acute angle between L and the z-axis. 2. Relevant equations 3. The attempt at a solution Sorry, pretty much in a rush to finish this soon as I have been stuck at understanding this vectors chapter for a really long time. I hope someone will be able to help with it...I've tried but I really cannot figure it out alone. I don't know what concepts I am missing out on but I am stuck. Help will be much appreciated. I'm trying to learn and not just get answers. Rushing on revision as I don't have much time...planning to finish my math revision in 2 months. All I know is the fact that if vectors a and b are perpendicular to each other their product of directional vectors will be zero, but that's all. And it is not helpful.