ì5g 



ì cos (Ip-i-q) 



PAR M. PLANA 



fu, + ] cos Ip-i-el ( Cr, -+■ 



e'2(^G3 'jcos(Vj+7') + e^2(G; 4- G, ' j cos + 2^) 



2 G5 G^ j cos ( Ip -+- 27' ) 



ee'l 



ee 



2(g, 



(>,._,) ^{X-t-i) 



-t- \ ) \ 



Gù \ cos (Ip -i- q' — q ) 



G, j cos {)p^q'-^-q ) 





I 



















e2 





(X -m) (Xh- i) 



COS (Ip 2S) 



26' G^' ' — l)^^ ' I COS(}p — 2S) 



-t- 2tr, I COS ( Ap -h 7 -H 25 ) 



— 2G. j cos ( AyO-4-<y 25 ) 



e'IGì^ cos Qp-^q'-i- 2s)-^ e' iGj^^ \os(>p-hq' — 2s) 

 — 2eZ G,^ ^cos()/j — (y-t-25) -f- 2e2G/ \os(lp — q — 25) 



-f- e 



^l(^G, '-h2G^' -^-Q^' ) cos(lp-^2q-h2s) 



e^I^G^ --2G, -f-g/>3 J cos()/?-f-27— 25) 



^e^lbi ^^cos(lp — 2<7H-25) + ^ e'iZ»/^"*" ^\os(lp — 2q — 25) 



8 



8 



e'^lG^^ cos('kp-i-2q' -^2s)~he"'2G}^ ' ^ cos (>/?-♦- 27'— 25) 



