4
votes
1answer
116 views

Where is the error? - TikZ (angles)

In my thesis I'm doing a drawing with TikZ, but I get an error that I do not understand. Consider this code (simplified from the original, but still quite significant): ...
7
votes
3answers
2k views

How to Intersect an arc with a line without calculating the angle

I'd like to draw an optics-related figure, for which I need to draw several beams with varying opening angles, which will need to be labeled. What I've come up at the moment (boiled down to a minimal ...