->S»I ) 3<J ( ^ 



<•_ r» Vfi-.eof.tt«— cof.&^ — cor. e^- t-*co/. ««/•&"/ • c). 



lin. U _ . y,„.«;r«.-6 ^ -' » 



Tbi loco radicalis ponamus 



y ( I — cof. a* — cof. b^ - cof. f* + 2 cof. a cof ^ cof. f ) =:^ 

 et ad calculum contrahendum pro numcratoribi>s ftatuamus 



cof. a =r a, cof. ^ — p et cof. c — y, 

 Tt fit 



/: )t — I — a a — (3(3 — YY~^^*(3V' 

 Hoc fado erit 



cnr A — « — P > • rnf B — P— -«V • cof C — ^ * ^ ; 



fin. A =r p:r-r W ; fm. B = ^*— ; fin. C = 



Jm.bfm.c ' ' /in. aji/i. c' * jm.u/in. 6' 



§. 8. Coniungamus nunc primo angulos A et B 

 ac reperiemus 



fin.(A+B):.fm.Acof.B4-cof.Afm.B = -^i9^.^tP)_. 



cof. ( A 4- B) n cof. A cof. B - iin. A fin. B r ^^jMjl^rtiJL^ , 



Quod fi nunc tertium angulum C coniungamus, erit 



fm. ( A 4 B4 C)=:fin. Acof.Bcof C4- fin.B cof. Acof. C 



•+ fin. C cof. A cof. B - fin. A fin. B fin. C i 

 cof.,( A + B -f C ) = cof. A cof. B cof. C - cof A fin, B ftn. C 

 -cofBfin.Afin.C-cof Cfin.Afin.B, 

 Tantum igitur fupereft , vt in his formufis loco liteKarum 

 maiuscularum A , B , C , Yalores modo affignajtj fubfti- 

 tuantur. 



Prima Inueftigatio , 

 pro fiii. S. 

 §. p. Cum fit fin. S n: - fin. ( A H- B -f- C) , erit' 

 fin. S — fin. A fin. B fin. C - fin. A cof; B cof. C 



- fin. B cof. A cof. C - fin. C cof A co(. B, 



quac 



