sin 



40 COMMENTATIO 



fcOsS= — cos C<r+A) + (cos + + cos d) . ^^^ q- • cos >^ 



COS J.COS^ 



=! ^COS ((7 + a) + 2 cos 1 (5 + / + r/) cos l {s+l-^d^.N 

 Ponito : 

 Cos;^j=3acos|0 + /+fi?).cos|(j + / + rt?) . iV 

 Erit: 



COSS= — COS ((7 + a) + COS ;^; 



=S2sinlC(r + A + %).sinKo" + A — %) 



cos5 = --cos((7 + A) + CcosO + /) + cosfi?) .iV=i — 2sin*|S 

 ;in » i 5 = I (cos (0-+^) — i) — cos | C^ + Z+^^) . cos lO-\-l—d). 

 =cos * i ((T + a) — cos I C-f + /+^) . cos i C^ + '+ ^) • -^ 



^ cos^|(o-+a) 



Ponito : 



COS^|(a- + A) 

 Erit: 



sin»iS = cos»i(5- + A)(i — sin^cJj^^cos^^K^+^^^cos^O 

 sini§= cos 1 (o- + a) . cos 4) 



S = — cos (o- + a) + (cos (i 4- /) + cos d) . iV= 2 cos » i S — : 



1 COS(fl--}-A^ 



|5 = 1..JLJ. + cos 1 (^ + /+ ^) . cos 1 (j +/— ^ . iV 



^ sin^|(A + (r) ' 



Ponito : 



.,„3..j-^o^K^ + /+^).cosK.+/-^) ^ 



sin»i(A + 

 Erit: 



cos ^|5=sin*i(cr + A)(i+.tang=;;.)=:sin=i(cr + A).sec»;// 

 cos|5= sin|((7 + A).sec<^ 



cos 

 cos'' 



