= (^03) == 



<f\i^ s et 0* abfci(T;ie in contrariam partcm vcrgant, applicata 

 vcio in 0" cric 



a-^ — y = —1— (a P cof. (J) -h Q fin. 0) - -^■'-'- , 



(qiiia Amuo C|) negatiuo qiiantitatcs P ct cof. cundcm valo- 

 rcm rctip.cnt, quantitatcs vcro Q ct fin.Cp fiunt ncgatiuae) qui 

 valor conucnit cum praeccdcnte. Sicque rc^fta a c^ ad axcm 

 jn a normalis, fimul crit diametcr noltrac curuac. 



^. 44. Sumatur nunc in diamctro ac rctro producTto 

 puncflum 0, vt fit aozrz ■■■ "'' , ex s porro .ad diamctrum du- 



catur normalis sj, et ob a j zi= .v j — 7 erit 

 j. = _1_ (a P cof. Cp -I- Q fin. (p) ct 

 O' = ^"= ^^ (a P fin. (J) — Q cof. (p). 



Hinc crgo fi dncatur re(f^a jo, fccans .axem in puncfto «, eriC 

 S = -^— V^(a a P P -i- Q Q) =: -11_, 



aa-t-i'^ >t.'<t./ aA-Hi' 



pofito S = >/(a a P P -}- Q Q). Vocetur nunc etiam angulus 

 jojzroj.vmvp, eritque 



tine vl* =. '^-^ = « P. /•/?!■ — o co/. iP a V tang. >$ — 1 



O' T oy a t LOj. ^ -r- njm. (P a i" -+- li i aug. ^3 



Introducamus nunc angulum ^, vt fit tang. dzz:-^, critque 



idcoquc \jy =$) — ^. Cum nunc fit anguhis i r « zr: ^), hinc- 

 quc angulus r i v =:: 90°— (J), crit angulus Oirr^pc" — (p-n vl^, 

 quamobrcm fiet ifte angulus i r zz: 90° — ^, vndc concludi- 

 rur aigulus a s = ^ ., qui crgo e(l angulus, qucm rccla os 

 cum ipfa curua as conftituit, cuius ergo tangens clt — ^, 

 hincquc fin. ^ zn f et cof. $ — 11. 



§. 45. 



