283 
wsht 
y -> tn x y m mx 
(Cos — ) Cos ( — ■ -f- A) dm = 
a 2 2 
at. m 
( Cos -) Ï 4 Io g ( Cos ~) Cos(~ -I - A) 2 x Sin (~ + ^)] 
fliX 
2 
mx 
2 
X . 
— 4 Cos ^ Hog (Cos— ) ■ — 2 a; Sin ^ 
2 
■X 2 •+- 4 log 2 (Cos—) 
-2 
/ m try X J n , mX 
(C°s — ) Sin ( — -fr- A) dm = 
X m X mx _ mx 
(Cos—) [4 log (Cos — ) Sin ( f- A) — 2A; Cos ( f- A]\ 
X 
— 4 Sin A log (Cos — ) -f~ 2 at Cos A 
2 
X 
X 2 -+• 4 log * 1 (Cos — ) 
2 
s. 
1 Hr r m 
a - ( ) 
m , 2 
( ) dm = 
2 log 2 — log (1 f rj 
ubi ^ quantitas quæcunque sit, quæ ab m prorsus non pen- 
deat. Jam fiat in formulis (20) et (24) A = 1 , atque multipli- 
centur hæ per dm et sumantur integralia a m = 0 usque ad 
tn = xj obtinebitur adeo 
