conic

does the auxillary circle of ellipse is for specific ellipse or it can be the auxillary circle for more than one ellipse

17 Answers

1
peas venkat ·

b includes e , that is if b/a is fixed for an ellipse ,e is also fixed. so only one ellipse for one auxillary circle .

1
peas venkat ·

no . , ok understood

11
Anirudh Narayanan ·

1
rashi mathur ·

ok

1
peas venkat ·

not convinced, ur argument does not satisfy my argument

1
peas venkat ·

sorry (a cosphi,c sinphi)

1
°ღ•๓яυΠ·

i dunno y d hell r u nt undersatndin that eevn e can change

1
peas venkat ·

b/a is now c/a , if it is so then for the same eccentricity angle phi, the corresponding points on the auxillary circle will have infinite coordinates , which is not possible, same point will have (acos phi , bsinphi) and (a cos phi ,c cos phi). so only one auxillary circle and one ellipse

1
°ღ•๓яυΠ·

na.................
c auxilary circle is
xsq+ysq =asq

a=minor axis

nw only a cumz rite ??

nw consider

ellipse
xsq/asq +ysq/bsq =1

auxi circle is xsq +ysq=asq

nw consider ellipse
xsq /asq +ysq/csq=1

auxi circle is
xsq+ysq=asq

so these r two difrnt ellipse bt auxi circel is same
so one auxi circle can hav many ellipse coresspondin 2 it

1
°ღ•๓яυΠ·

it can b for more then one ellipse i mean auxilaary circle only depnds on d major axis .so if d minor axis change then ellipse change bt circle remaiins same

1
°ღ•๓яυΠ·

cuz change is d law of life .............or say spice of life ;)

1
sriraghav ·

Oh...sry.....
yes...When u increase the eccentricity of the elliplse(less than one) to one... u will get the auxillary cirlcle.....so there may b infinite ellipses...

BTW tanx wats in name(WHY NOW ~~~~~~)

1
°ღ•๓яυΠ·

hey sriraghav wat u gave is d equation of director circel this person is talkin bout auxilary circle wich is
x^2+y^2=a^2

1
sriraghav ·

sorry it is b square

1
sriraghav ·

no it is only for one ellipse...coz the radius changess

x^2 +y^2 = a^2 + b^6

1
°ღ•๓яυΠ·

ya so eccentricity will b chnging na

1
peas venkat ·

but b/a for ellipse is fixed

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