…but L2 lies on the plane? Wouldn’t this give me a line that only intersects the line at P? Or do I need the line joining P and the intersection of the normal from (4,-3,7) and the plane?
Comments
Log in with your Bluesky account to leave a comment
So dot product of L2's direction vector with normal to plane is 0, and dot product with L1's direction uses the angle given - feels like it should be possible? Will have to get pen and paper out over breakfast now!
Sorry running out of time this morning, and also got stuck so far, nice numbers so 30⁰ and (1, 1, 2)? And 4a+3b+5c=0? But the other one should be solveable but feel like I'm missing something crucial while brain not woken up yet!
Thank you - saw that, and others' replies, and all makes sense! I shouldn't try to do maths before 9am, the number of times I also tell my students not to get bogged down in the algebra if they've not looked at a simple diagram and seen if there's a "simple" geometric explanation!!
Comments