/ 
cfegjjfe 
281 
v/ 
* 
Sic e. g. ; si et qui sequuntur exponentes, nihilo æqua- 
les sint, erit ex his formulis 
/ - W A AT M _ 
(Sin — ) Cos 
o 2 
mit - mXx 
dx 
1-2 r Cos # -+• r 2 
-A 
9 ? 1 - r w 
1 - r 2 
it Xx m mit-mXx 
* C- 
(Sin — ) Sin 
n 2 
1 - sr Cosa; -fi- r a 
Sin a; . a?a; A 
it 1 -r y» 
2 T 2 
7 K -J* 1 
r .2 
quarum formularum si illa differentietur respectu ipsius 111 et 
post differentiationem fiat m = 0, obtinebitur 
f 
it • Ax 
log (Sin — ) dx 
0 o. ' 
2 - 
- - •> — 
tl' 
‘ 1 - 2r Cos X -fi— v 2 1 - r 
atque si formula (s?J ab hac auferatur 
1 - r 
log (—— ) 
/ It f\Su 
log (tang — ) dx A 
2' w 1 -r 
' — ~ - — - log ( -) 
i-2f Cos X -fi-r 4 1 - r- X 
1 fi r 
Xx 
(b 18. 
Sit jam 
m n 
Ç(g, b) =s= a . b 
a oc 
~i~ 1 > $ — 
56 
