171 
unde, integrali ab y = 0 , quo casu v est = a. c, ad y = /, 
quo casu u ~ /3 . r, surato, obtinetur 
^ , r r k sin a 
- . -D.~-.~-. — — 
f , ‘ I 2g f 
~~ • ^ — : — ~ Io s- h yp* 
c [6 X sin « 
oc . c 
_ 0 c jesmn 
D — ß , c 
1 Z g f 
Ex modo autem ratiocinandi, qui in §. 4i ad valorem ipsius 
K ** 
-j- deducendum adhibitus est, et quia— = sin u , sequitur 
ne- 
cesse esse 
k 2 y- 2 
O 
(l + n~f" e]) 
r z * sin« /3 
('+ S/\ô)) 
sm u — 
» *y 
quæ æquaiio subministrat 
;«■ 
je 
/3 
a — , quando zc est ::: go 5 
2. 3 
Posito I r: — , [z*f— l/(# J]) 2 * , erit — /3sinzc:= V^/3sin 4 M,* 
r 2 ü 2 n J I 
unde 
2g 
f 
\J Aß sin 4 u 
log hyp. 
Dc 
2gt 
V 
Asin 4 u 
T“ 
cc 
. Posito 
Dc 
Asia 4 n 
2g\^ ß 
& 
2g f ___ 
a 
a = 0, fit — . — — rs V° • /3 log- hyp. 775 unde /3 — 0. Posito 
c ° 
et « ss 0, et / = Oj ß = ce = r. (æqu. XXXII). 
