83 
REC AS UNE 
PROBLEMATUM GEOMETRICORUM; 
E X MÆETHODO TANGENTIUM INVERSA, 
Ra DT UM js REC TANENRRS 
AUCTORE 
N I. C 0. L 4 0 MEL :S ASE 
Conventüi lexhib. die 13. Junii 1709. 
Problema I. 
Täb: 1 (SE  Znvenire curvam AY, ad punctum firum C re- 
Fig 5. latum in cujus quolibet puncto Y radius osculi YR aequaæ 
lis sit rectae CY ex puncto fixo C eductae. 
SOLS 
Vocentur radius osculi YR—r, recta CY —%, per- 
pendiculum ex C in tangentem YT demissum CT —#; 
ductaque per panctum C, pro arbitrio, axe DE, “sit an- 
gulus DCY —;.eritque pro puncto curvae proximo y 
_ angulus YCy — %, perpendiculum ex Y in Cy. demis- 
sum Y3 — 10 ty — o7 unde fit elementum arcus 
RENE 2200. Tum vero ob  triangula Yy3 
