Full text: Zur Reduction elliptischer Integrale in reeller Form ([Hauptwerk])

92 
W. Sc HK II! NEU. 
[36 
y ' jg 0 _ x x * s ^ n '/’ s * u % — cos t/) cos / J (/ 1 x 
siii</> cos4- cos<p sin/.^/ 
_ sin cp sin/z/t/)z// — cos cp cos/ 
COS(p sin /z/t/> 4- siiup cos/z// 
sin/ cos/z/(p> — sin(p COS(p J/ 
sin'i/) — sin'/ 
X '*/' sin 2 t/) sin 2 / — COS 2 </> COS 2 / 
sint/> COSt/^z// -+- sin/ COS/z/t/) 
Für y u = o, ip u = c«), (p = ip und Ip = — 
erhall man 
oder 
costi/ 
Sint'J = —— , 
zlip ’ 
cos to 
Stil W = —— 
/1 CO 
Jio = sin t// cos 10 4- /.' cos t// sin (0 = 
z/l// 
. , * /. 
J Ü) = COS l// Sill CO ■+■ 7 Sill Ip COSW = — 
' r ' J10 
, sinto 
, Stil li/ 
costo = X —, 
Jlfj ’ 
1 = x'tgt//tgio , 
COS li' = 7. —;— 
T z/to 
x' = Jlpj(0 
Diese Relationen gestatten die vorhergehenden Ausdrücke für sin co 
cosco z/to direct aus denen des vorigen Artikels für sinip costp z/tp 
abzuleiten. 
Die Verdoppelungsformeln endlich liefern, für / = t/ 
oder 
ferner 
oder 
sint/» sin ff cosff sinI/Z tgl/ 
i + J ti> ~ jq. cos (/' -+- J ip z/ff 
pi 71 dtp 
I 4- sin to 
costo 
= tg ^|to 4- 
JT ■ 
2 
,tgff 
* z/ff 
x'sinto 4- z/tO 
cos to 
tg ff ¿/ff , 
x'4- z/to z/ff 
costo sillf/ COSt/)
	        
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