PAR M. PLANA 189 



-HeV'^ -^^^sin7'-^sm(7'-37)-t-^sln(3<7'-a^)-H-2-sm(3r/-t-2^)^ 



-+-e V i sin (7'+ ^) - :^sin (7^(7) --^ sin ( /y'-H 3^) -+- sin ( - 3^ ) ^ 



_^eV*( isin^-^sm(27'-7)-^sin(37'-4-27)-H~sm(3^'-2^7)^ 



-heV*^ ^sln2<7 — -^3Ìn27'-*-^sin(2/7'-^2<7) ^ 



— ee'*^ ^sm(2<7'— — ^^sm(4V-i-(7)) 



,)*= e' ^ ~ — 2C0S 2<7 H- ^cos4'7^ -He^ cos^-4- cos5</^ 



V ^ ^cos(^'+<7)— ^cos(</'--<7)— |cos(<7'-t-37)-4-|cos(^'— 37) ^ 



|c0S(7 — |^COS(2^'-7)+|^COS(2^'-3^)-|^COS(2(jf'-H37)) 



/ 5 5 5 5 \ 



ee" — j cos -t- <7 ) — cos ( 7' — 7 ) ^ cos {'iq'-^q) 4- cos (37'— 7) j 



■+-eV ^ -7C0S 7' — ^cos(7' — 27) — ^cos(37'+27)-H^cos(37'— 27 )^ 



I — cos^7 — cos 27' — ^008(27'-»- 27)-!- ^005(27' — 27)^ 



