Cafu n-:+:oo cft tangADzr — cota, h. r. — AD 

 foti A U — 90° — a. Tunc enim ob P I\ _ A R -I- a ~ yc°, 

 B eft poliis ciiCLili RS ad A B nornialis , pioinde ftniper 



cof AS:cof BS — cof AS : cofpo":^ cofAS : :±o-:zz^oc : i. 



Caf[i n — — I cft tang A D 1= — cot r. a, h. e. A R 

 — 90° — 5 v, B R — 90° -h i a: eft autem 



cof (9 o' — ^. a) — — cof ( y o* -i- ^ a ). 



Cafii a.-gc" eft tang ^ r ^. Cafu antcm a-i8o'cft 

 (Prpo": fi cnim ABri8o°, fcmpcr cft BDr is^"— AD, ergo 



cofA Drr — cof B D, 

 excepto cafu A D = 90*, iibi cof A D rr cof B D — c, et 

 cof A C - cof B C r c^ alque hoc folo cafu acqualio cofA C 

 rrncofBC locum habcre polcft, {juoniam o — n.c, tiuic- 

 quid n denotet, cxccpto n — 00. 



Problcma III. 



5. i". /77. Inicnire locum vcriicis , fi ralio finuum 

 dimidiorum laterum cjl coiilians. 



Hoccc cafu eft fui ^. A O C rrn Hn ^ B O C, ur.dc fe- 

 fcquitur 



I --CGfAOC=r n-(i — cofBOC). h. e. 



n* — I zz: cof vl/ [n* cof ( >t — Cj ) — cof CJ. ] , 



proindo 



cofv]-' = r/ ~ ^ — . 



Pofilo \]^ rr o fcii cofvV— i> fit 



