O I II

Calcul de u. Calcul de nt.

- 6 , « ft loff sina = 2,556o4q5

logtang- =0,1749308 ^ . ' /^

2 logsinw = 1 ,9714173

logtang(^-^) =1,9843677 -logsini'= 5,3i44a52

loge sin a = 3,8418920

logtangj =0,1592985 ^^.^^^ gg^g,5^

îi = 55» ,6'48' " = ^9*°'®'

2 nt = u — e sina = 39io67'',49

u =iio''33'36'' =108*» 3/ 47', 5

Résultat :

/ir = 108"37'47%5.