4?« DEEFFECTF 



confpicit. Vt igitur hoc pundum determinetur , du- 

 cantnr ex s perpendiculares st ac sg, ac fatis liquet , 

 pr(»dii<fla st vsque ad i inueniri sg j minuendo kb 

 ri.dla ik , redam vero st haberi , minuendo bc leu 

 kd reda is. 



Notemus hic Fig 12. exhibere vndecimae ichno- 

 graphiam. Litteris, quibus in ip(a v(us fum , denotantur 

 pundla refpondentia punftis figurae antecedentis . iisdera 

 Iiteris notatis. Addidi hanc figuram , quoniam vHam 

 eft , ad meliorem comprehenfioaem plurimum ipfan]; 

 conferre pofle. 



Liquet ex vtriusque figurae intuitu , triangnlura 

 hts ad i cffe reftjngulum , angulum vero ibji =■(]). 

 Modo igitur detur ipfius hypothenufa fex, reiiqua latera 

 fimul innotcfcent. Eft autem in circulo Q^rwi, ^D 

 fin.cP-fei : mk — mk: kSi hinc mk* — s*zzi zDCin.<^^kj 

 — fe/. Negligere autem licet terminum /bj*, qui in 

 fuppofitione noftra femper eft admodum puruus , rnde 



prodit ks^^^TDjr^T^y ^<^ «/ — 70, et .t ; :z: 7^,,.^ 

 =:;Id|«I^, vt fic reperiatur sg=:v-~f,, ac j^r^r 

 °- »Dtaag.(p - Rurfum hic in valore ipfius sg termi- 

 mim 7d , tanquam valde paruum et incomparabilem, 

 abiicere licet , quare tuto (upponitur sgzizkbzzv. 



Vfurpando hos valores pro sg ^c st repertos , 

 eosque in fupra repertam formulam fubftituendo , affj- 

 mit ipfa hanc formam : 



H-[JL /cof. ( (!)+($) 

 z^D tang. Cp 



Sicque 



