It seems, that it is a difference between orientation of the circle between GeoGebra 5 and GeoGebra 6.
I see this. I've addressed your question to the Team.
How to reproduce the issue:
Select Integralkurve,integralfunktion checkbox
Fahrradlenker Bild checkbox.
v.5 and v.6 display different angles.
E and F are swapped (due to the CAS loading)
Try this instead:
F = Intersect(g, tangente, 1)
> E and F are swapped (due to the CAS loading)
Yes. Swapping points is a problem of (dis-)continuity.
But in this case also a problem of a different treatment of the same construction in GGB5 ans GGB6 !
I don't believe, that it is a problem of CAS.
I think the problem is: I constructed with GGB5 and the webversion worked like GGB6.
See the screenshots in the attachement. The place of E and F swapped.
I found a way to avoid the problem. Using semicircle instead of the circle, I got a construction which works in the same way in GGB5 and GGB6 and HTML-Web (not in the attachement).
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