128 GIUSEPPE GOBI 



log C = 2 log (1 -j-8 cos^B) — log (1+8) 



= 0,0036054.8614—0,0029083.5954 = 0,0006971.2660, 



log C = 2 log (1+;m cos2B) — log (1— m 2 ) 



= 0,0006922.5748—9,9999951.3087+10 = 0,0006971.2661, 



log C = log (1— e 2 ) — 2 log (1— e 2 cos*p) 



= 9,9970916.4046— 10— 9,9963945.1386+10= 0,0006971.2660, 



log C = 2 log il—ri') — 2 log (1—2 n cos2p+?* 2 ) 



= 9,9999975.6542—10—9,9993004.3882 + 10=0,0006971.2660, 



log C = log (1+8) — 2 log (1+8 sin 2 P) 



= 0,0029083.5954-0,0022112.3294 = 0,0006971.2660, 



log C = log (1— m i ) — 2 log (1 — »mcos2|3) 



= 9,9999951,3087—10—9,9992980.0426+10= 0,0006971.2661. 



Si può ritenere 



C = [0,0006971. 266]=1,0016064823. 



Per un'approssimazione maggiore si hanno le forinole : 



C = 1,006719218662— [8,1283487.701— 10] sin 2 £+[5,6517292.— 10] sin 4 B 

 = 1,006719218662—0,005119244255+0,000006507937=1,001606482344, 



= 0,993325627904 + [8, 1254404.107— 10] cos 2 B+[5,6517292— 10] cos 4 B 

 = 0,993325627904+0,008263667680+0,000017186703=1,001606482347, 



C = l,000011211642+[7,8258670.293— 10]cos2B+[5,0496692— 10]cos2B 

 = 1,000011211642 4-0,001594634989+0,000000635708=1,001606482339, 



C = 0,993325627904+[8,1225320.511— 10] cos 2 p+[6,1230337— 10] cos 4 p+ 

 +[4,07238—10] cos B ?+ [1,994— 10] cos 8 p+... 



= 0,993325627904+0,008229436539+0,000051134000+ 



+0,000000282417+0,000000001463 

 = 1,001606482323. 



