■"Sfrgy 265 
/ 
?\»oc 
05 *tang — log (Cos/A*) dx 
2 
h z -f* x z 
-Ah 
7S i — e 
““ • 
2 
-Ah 
i-f»g 
!og( 
i -\-e 
-2ÏA h 
\ - ** i 
•) l0g '• 2 
2 
/ „ _ _ _ , . . -Ah -2} Ah 
w X Cosec Ax log (Cos lAx) dx 7t . e i -f e 
^-r =— ~ h 1o ^~ > 
X- 8 
§. 12 . 
Sit exempli secundi causa 
m 
/(o) = o , « = + i, *s= — i , 
unde fit 
w-4-* 1 nt ni 7t , 
— “ (Sin /Ajc) Cos ( — m l A x) , 
2 
H = 2 
_ _ ÎH-j-1 , 7« >/2 9T 
# = — 2 (Sin lAx) Sin ( — mlAx) ', 
z 
hisque valoribus substitutis ex formulis (r), ( d ) et (e) obtinebitur 
f 
A* 4 - x 1 1 
• (a») 
x Cot Ax (Sin ÎAx ) Cos ( m/Ax) . dx 
2 
-2AÅ -2/AÅ 
77 1-1-0 1— e fff 77 
J* ( ) 
2 -2AÄ v 2 »i-j-1 
i — e 
' a 
O** 
