Full text: [Allgemeine Analysis] Theoria combinationis observationum erroribus minimis obnoxiae (3. Band)

QUAM IN PUNCTUM QUODVIS POSITIONIS DATAE EXERCERET PLANETA ETC. 
349 
y'cos T-\-y"'sin T, sine respectu signi, minor quam -p Hinc concludimus, quo 
ties gj sit quantitas positiva, variabiles E et T semper simul crescere; quoties 
autem g-y sit quantitas negativa, necessario alteram variabilem semper decrescere, 
dum altera augeatur. 
1 3. 
Nexus inter variabiles E et T adhuc melius illustratur per ratiocinia se 
quentia. Statuendo \Z(n — l) = ita ut fiat SS = ex 
aequationibus 20, 21, 22 deducimus 
t (3 -f-a cos E -f- fi sin JE7) 
== ‘yS + aa + €6 + (‘y , 8 + oa , -|-66')cos r + (Y'£-{-aa"-|-b£)")sin T 
= (T —1— ^—{— T" cos 2H-T"sin T) 
Perinde ex aequationibus 21, 22 sequitur 
i (a sin E—fi cos .E) = g^sin T—y” 008 T) 
Hae aequationes, statuendo 
|=cosE, -|-=:sinE, -j- = cos M, ~ = sinikf 
8 ’6 8 o 
nanciscuntur formam sequentem: 
#(l + cos(E-E)) = ( T +^)(l + cos(r-M)) 
isin(E—L) = gsin(!T—M) 
unde fit per divisionem, propter (y + ^Kt— 8) = 1, 
tang | [E — L) == g (y — <5) tang | (T— M) 
tangi [T—M) = s (y+S) tang | (E—L) 
Hinc non solum eadem conclusio derivatur, ad quam in fine art. praec. de 
ducti sumus, sed insuper etiam patet, si valor ipsius E crescat 360 gradibus, va- 
lorem ipsius T tantundem vel crescere vel diminui, prout sit vel quantitas 
positiva vel negativa. Ceterum statuendo 3 — tangJV, y = sec N, manifesto erit 
Y — S = tang (4 5° — |JV), y + ^ = tang(45°-{—|JV)
	        
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