704 DE DECLINATIONE 



ex nota triangulorum fphaericorum pioprietate fta- 

 tim colligitur 



ct pofito CXrr^y, in fubfidium calculi fubfequcnti» 

 computetur 



cof. V ZZ ^"^' "' "-^' ^* "" ^^ 



t*ro altero angulo C L ^ inueniendo demittatur cr 

 ^ normaliter in P C arcus A e , pofitoque fegmentd 

 « 6 zzy , vt fit 



tang. j^ zz tang. p. cof. (<}) — 3-) 



liabebitur 



«X quo , cum pro figura adpofita fit ^ C X =5 

 4[ -i- P C X , angulus P C X — -kj innotefcit. 



Demiifo iam ex O in CX perpendiculo OF 

 €t pofito fegmento FC = 2?, obOCP = S9 ^"^ 



tang. z :=z -^ fin. yi, tang, O C 

 Cum vero fit 



cof. O P = cof. h. cof. O C 

 tt 



cof. O X = cof V. cof. OC - fin. v. fin. OG. fin.-»;, 

 aequatis inter fc O P et O X prodit 



lang. w * 7?;^„-^ 



adeoque hinc 



_ cof, 



Jm. V 



4|ua 



tang. isir^-''-^-^ 



I 



