anonymous
  • anonymous
prove that the directrix of an ellipse is \[x=\frac{a^2}{c}\]
Geometry
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
this ellipse is the general ellipse with \[\frac{ x^2 }{ a^2}+\frac{ y^2 }{ b^2 }=1,a>b\]
anonymous
  • anonymous
i have the proof but i dont understand the ratio set up here can i post the link
anonymous
  • anonymous
http://mathworld.wolfram.com/Ellipse.html

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
\[r=\frac{ a-c }{ d-a }=\frac{ a }{ d }\]
anonymous
  • anonymous
\[a^2=b^2+c^2 i dont get this ratio .why it holds
experimentX
  • experimentX
??|dw:1364055606757:dw||dw:1364055629069:dw|
experimentX
  • experimentX
i haven't done conics for quite while, but this shouldn't be difficult.|dw:1364055735803:dw|
anonymous
  • anonymous
i mean http://mathworld.wolfram.com/images/equations/Ellipse/NumberedEquation12.gif
experimentX
  • experimentX
what's r there?
anonymous
  • anonymous
its defined in the 1st link
experimentX
  • experimentX
can't find it ... equation no?
anonymous
  • anonymous
24
experimentX
  • experimentX
what is this 'c' again?
experimentX
  • experimentX
this 'c' looks like foci.
experimentX
  • experimentX
this is pretty ovbioius ... this ratio must be constant

Looking for something else?

Not the answer you are looking for? Search for more explanations.