">I4^ ) 2 89 ( l?l<- 



A z 



qul valor in priore aequatione fubftitutus praebet 



^-2/NV<^ + 2 = M, fiue ^f + 2=:M4-2/N^^ = L, 



ponendo breuitatis crgo LrM+2/Nd^<^. Conftat autem, 

 fi efiet L — o, tum fore 2 — OLCof.^, qui valor, ctiamfi 

 tantum eft integrale particulare, tamcn rufficit ad intcgra- 

 le completum inueftigandum. Statuamus igitur pro iiollro 

 cafu efle 2 — 'ycof. ^, eritque 



J-| - - ^ fin. ^ -f- ^^^ cof. <>: et 



l^? = - c; cof. <: - ii^ nn. < 4- ii^^ cof. <, 



licque noftra aequatio euadet 



^* '"" cof. ^ - i^ fm. ^ =z L 



quae per ^/^. cof. ^ multiplicata praebet 



^ cof ^*-idv fin. < cof 4 .— L ^(^ cof. ^, 



cuius integrale efl 



^^-cof<^— /L^.^cor<, 



vnde coUigitur 



^uae aequatio denuo integrata dat 



c;:r/3l|,/L^.^cof4 = tang.^yL</.;:cof<^-/L^?fin.<^, 



quo valore inuento erit 



2 rr fin. </L d^c^.^- cof <^/L d < fin. ^, 



\bi binae formulae integrales iam binas conltantes pcr in- 

 tegrationes ingreflas inuoluunt. Cum dcinde fit 



^""-fH d^- 2 2, crit 



^|-/Nfl'^-2fin.<?/f fl'^cof^4-2cor.^/I.^^fin.^, 

 A&a Aead, Imp, Si\ lom. 11 P. II. O o hinc- 



