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1/a is not needed only in arcsin(x) because when you pull an a^2 out of the root, it cancels out in the end.
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AS Test:
lim of a sub n HAS to =0, a sub n-1 has to be less than or equal to a sub n
Remainder
abs(S-Sn)=Rn< or =An+1 -
(x-h)^2=4p(y-k)
p is distance from vertex to focus.
This equation is for vertical parabolas
x=h-p -
Eccentricity=c/a
A=pi(ab)
