[openbeos] trigonometric functions

Hello,

I've run into a strange problem. When running the Haiku app_server on 
R5, Painter draws ellipses just fine. However, when running the real 
thing, ellipses look really strange, though they look always the same 
weird shape. At first I was completely puzzled, but now I'm suspecting 
that maybe one or more trigonometric functions might return bogus. Any 
ideas on how to track this down in an efficient way? I have not digged 
to deeply into AGG to see which ones it uses, but I'm hoping that there 
are some tests which I can run on stdlib, libroot or whatever 
implements these.

TIA and best regards,
-Stephan

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