25 7 
— Sin Ax -f- Sin awAx 4- Sin (2W+1) Ax 
1 4* Cos Ax 
,, Ax 
Sin — 4“ Sin (47/14* 1) — 
2 2 
Cos 
Ax 
Ax _ Ax 
= — tang — -f- Sin 2i»Ax 4- Cos 2W*Ax tang — 
2 2 
Ideoque ob formulam (a) 
f* c* 
Ax 
4-Cos2J«Ax — Sin 2»iAx tang — ) dx 
ss 
h 2 4- x a 
-(am-f-i) A h 
I ( l±î X 
Ä V -Ah 
i-jre 
atque si A mutetur in 2A 
J 
GO 
Sin 4»»Ax tangAx . dx 
h 2 4r x a 
r 
(1 -f- Cos 4»jAx) dx 
X- 
7 t 1 4" 0 
-r ~ • " 
h 
-2(2»! 4- i)A/i 
1 4“ ^ 
-2A h 
Cum autem sit 
/ 
» 
(14- Cos 4 wjAx) dx 7t -4wAÅ 
— — = ^ (l + * } 
erit etiam 
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