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Ray in a corner, 2

A simplification. Fix line to the x-axis The simplify to an expression in the given vectors. The pop-up window shows function f(x), from which the can be given as :
Lots of things are clickable. Now to reintroduce rotation... ________ Light > Reflection Prev: http://www.geogebratube.org/material/show/id/128470 Next: