8a PROPRIETATES 



rbi quidem, appliGatione ad duas primore& fada, fit 



ct ^-i^,^'^''^- |(5(-55)y . . . . ^bh-aa-ac 



Tpn S)f — ?li\ 66 — (a-i- c)2 / (a-t-c-H6Ua-(-c — 6) 



S c h o ! i o n. 



Tab. I. 2r. Formula haec geiieralis co maiori' cui-a 



Fig. 5. euolui meretur , quod adliuc foli indudioni inniti- 

 tur , ideoque Tberiori con€rmatione indiget. Sinf 

 igitur trianguli ABC latera AB = c, AC — i»,, 

 BCrr^, et anguli Arra,. Bcr^, C — y, vbi qiii^ 

 dem affumimus efle ^ — lia. Nunc vero efl: 



col ar^ — 7J7 — et fm. o.— rS"^ 



ex quo formula noflra inuenta indnet hanc forjnam :; 



5( [k- coCa+bcV'i fm. a)' > 35 {bc coU-bcV- 1 fm. a/ 

 quae per principia nota transfunditur in hanc t 



^bV{coa a + V- I fin.ia)+Sbb'<^' (cof fa-V-ifra.fa) 



Cum yero fit 5{ + 23 == i , et ^-^^j^'^'^a r 



ex formula cof. p=: cof. 2 / a m "- — ^ ^ fequitur 



fbre 



I +cof.a/«=:':^^^^ ideoque 35.5I.==f^§|gv 



at fin.a : fm. 2ia — fl : b, vnde 33-5(= ^fSlTij feu. 



fD - 5( = T^S^T^- Q."0 ciJ^c^ habebitur :. 



' — '.fin.ia. p*. g* coj.ix-h^' — '^ 



\,Jini(K j Ct (^ __ jV,_i/m.!a. 



ficque 



Of — co/.! a -f-V — t.fin. ia, „. cvk coj. ici-i--\' — '.fin. igi 



51— — Iy-i,./m,« — j et 50 — 



