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The book says that the distance c between the centre of an ellipse and a focus of an ellipse
can be found according to
, but I can't see how they derived this. I've tried looking for applications of Pythagoras' theorem but I'm getting nowhere. ThanksLast edited by Identity (2007-12-26 01:03:05)
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You forget Eccentricity!
eccentricity of eclipse is:
Last edited by kevinant (2007-12-27 15:40:03)
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