⌈1 0⌉⌈x⌉=⌈ x⌉
⌊0 1⌋⌊y⌋=⌊y⌋
The above 2x2 matrix reflects a point over the xaxis. (x,y)→(x,y).
Derive a matrix that will reflect a point over the line y=kx.
(In reply to
researched solution by Charlie)
1. The problem says "derive", not "look up"
2. Try doing it directly in terms of k not the angle. It makes a nice formula.
3. The partial brackets? I don't remember how I did them. I think I found the codes but I may have cut and pasted.

Posted by Jer
on 20150401 21:08:11 