PERTVRBATI PLANETARVM. 145 



qii.ic forn-ia ob XX-h Y Y-}-22 — ijv rcdiicitur 

 ad h;inc : 



Ex \aloribus nutcm pro X et Y fupr.i §. 4. iniicn- 

 tis coiligimus : 



X cof. ^ -h Y fm. Q — rj (cof. cr cof ( - v|^ ) + fi"- 0- cof 03 fm- 



\bi angulus $ — \\^ cxprimit diftnntiam corporis per- 

 turbantis S a linca nodorum lcu angulum NAS:::^ 



— vl/, it.i Tt fit 



'u;'iv--i:v-\-i(U-2'V!i cof o-cof.(0-\4>^^-f fi n .o" cof 00 fi n (O-v^)) 



Vcrum fi iam brcuitatis gratia voccmus ang. SA2 



— {J- quo didantia corporis Z a corpore pcrturban- 

 te S ex A vifa dcfignatur , ob AZ — ^u ct ASc::« 



conftat forc 



Cf vf :=! c c -f- « <7 — 2 -v u cof jX 

 Yudc concluditur cffc ; 



cof G- cof. (0 — >4^) -j- fm. cr cof oj fm. ( - vl^) — cof fx 



id quod facillimc pcr trigonometriam fphacricam 

 probatur. Cum enim in fig. 2, fit BN— v|y,Fig. 

 NZncr et ang. YNZzltw fi capiatur ESrrO, 

 erit NScr^ — vl^, ct in triangulo fphaerico latus 

 SZ— [JL ex lateribus NZ — o", NS— — v|/ cum 

 angulo intcrcepto ZNSnzw hoc iplb modo dcter- 

 minatur. 



Tom.XII.Non.Comm. T XVI. 



