244- ^E PERTrRBJTIONE 



qui propteiea ipfi d t crit proportioiwlis , ciiisqiie locc» 

 in calculiim induci potcrit. Rclatio autcm intcr d dXQt d 

 elicictur cx acquatiouc pnma ponendo , z ~ b ; d(P~d(iX0 

 a—b—o ct AO — ROznZ;; quo fado crit -hdtsi 



— ~],bh~ i ^^ ^'t lit — — -jj — vnde aquationcs noltrac 

 erunt : 



I. ddz-zd(^' = ±^' (A!^/:iM-^r^') 

 11. zdzd<^-\-zdd(^= ^^^ C^, - l^.) 

 et mutata conflante C erit </ = es^i "^ — </ Cj>. 



§. 21. Antequam autcm hinc quicquam concludei-c 

 valcamus , valores analyticos pro dirtantiis AO ct BO in 

 calculum inducere oportct. Qiiia eft autcm CO — z; 

 CA — <7 ; CB — l) ct ang : OCR.— , erit cx regulis 

 frigonomctriac. 



AO—V(aa-\-zz — zazcoC&) 



ctBO— V{dlf-\-zz-i- 2 bzcoC 6). 

 Neque vero hinc in gcncre qnicqiiam , quod in vfum- 

 comicrti poflct , concIuJere licct , nifi diflantias <7 ct ^ 

 pr;ic dilbntia CO~z poaimus minimas , qui etiam ca- 

 lus ad v(iim Aflronoiniae maximc vidttur accommodatus. 



§ 22. Sint igitur diftantiae AC — tf et BCir A 

 prac CO~z quam minimae , ac pcr regulam approxi- 

 mationum crit ;; 



^,={zz-2azcoC.6-iaa) ^— -S-i™»"^ _ !ilL=:j£»/>) 



Hiuc igitur fict ; 



Z — a: 



