a, b, c, u: Bn ftnieS, i gt'l^c §. 20, cof.(n-fi) tvb fø!i]i;nt!C goml«; 
*i N l'n4-v') fÆ)'] 
- 1" + '■^) • ""g- (n+n.J = [ip J ' "3 
. < I N r "^l"^ 4- ^0 
cot, (11-4- iv) » im. I r j T c « t 
— cot (a-^i) - • + !-eot l^^ + ^'l cof " + '''^ 
es nfiSf - cot.(n+.) = a, f n_^^v , = c, [^^^j-^^ , = cot. = b, 
C9 QSqsationen fammentigucs mcb ben §. 20 / b« »il Ut iitbfccg SRii)tig§ebea af 
fefgcnbe govmlft: • 
. tang.[|] = tang.(nH-,v).cof.['^ + ;^^^ 
_cot.(n+0 = -i^l^.cor. " + 
i-<?J - 
§♦ 43' 
©stfeS b«c i b« to jlbf!« QSqaQCsotuc §. 41 n-fru ijlebcn fol* n: 6(tt)ef 
cot. ep = - cof. (n+vi) . tang. (n-f v) , 09 fin.((n+i)+|)) = S2Lg±f 
SJliti f«tte6 n-j-iv iftcbcn foc n, bliver 
cot.^'= _ cof. (n+iO . tang. (n+in), 09 fin. ((n+.)+p') = ^^^^^^^ 
