2CI 



inali, eiit qnoque C L ad O A , et C M ad O B normnli!?. 

 QuodCi iam dicuntur OL— x, LK=:/, KCrzzz, erit 

 OC zz: ]/;a:--'r-r-^ 2-=), C L =: O C fm A O C , C M := 

 O C fin B O C , ideoque C L = ;i , C M. Pofito autem 

 AODmCD, eft 



tang(|) = J, fin(p=:,,^^y, . 



cof CD = ^r^,^ , O K == ]/ {X- 4- J ), 



K M r= O K fin (a — 4)) ~ x fm a—y cof a, 



O M =: O K cof (a ~ <J)) = X cof .x -h / fiii x , & 



C M^ r= C K- H- K M- =r a^ -f- (x fin a — j cof c.f, 



C L- =jK^-{-z", unde feqnitur 



y^ -i-z- — iv %" H- ?2^ (x Jfin :i — y cof «)- , li. c. 



■fTI _2 - jy* — ':* (.■cr/n ^/ — y cof a)^ 



§. g. Affnmto alio qnocunqne abfciffarum axe O E, 

 priorem. OA fub angulo AOE=w fecante, ducatur KN 

 ad O K norraalis, fiKiue ONnzu, NKzni?, KC=:z. 

 Vnde ob K P N — O P L rr 90° — w, obtinemus 

 VN -V tang w , P K = i; fec w , ideoque O P = u — v tang co , 



cc ti2 O P cof 'jj = u cof w — V fin co, 

 L P = O P fin w r= u fin o) — 3L.""L" , 



y zz L P -i- P K =r u fin cj -I- i; cof w. 



Quibus valoribjs in aequatione III (§. S-) fubftitulis nan" 

 cifcimur 

 {n- i)z-=r u^irin^ta—n-rirf-o: cof^w -t-ciTr fmc/. cofa finw cofw 



— 71" cof- a fin- oj] -4- 2 u z; [fin u cofw — n- ''cof- a — fin ■rf) fin oj cofoi 

 -»- n" fin -' cofa cof^u — fin^w)] -f- ir [col-o) — n- fin-a fin'o) 



— nr fin ' cof a fin '- cofu — n'^ cof-a cof-O)]. 



Nova AUa Acad, Jmp. Scient. Tom. XIJ. € e An- 



