Find the equation of an ellipse

  • Thread starter Thread starter kasse
  • Start date Start date
  • Tags Tags
    Ellipse
kasse
Messages
383
Reaction score
1
How can one find the eq. of an ellipse given that the foci are (-2,0) and (2,0) and that the directrices are x=-8 and x=8?
 
Physics news on Phys.org
What have you done with this problem? You need to show your work.
 
the ratio of distance to its focus to the distance to the corresponding directrix is a constant. even in the case of two foci, as in the ellipse, applying this on a single focus-directrix combination is the whole conic section.
 

Thread 'Finding the nth roots of a complex number'

There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
View full post »

Similar threads

Finding the largest ellipse that will fit in a polygon
Replies
4
Views
3K
Showing that the solutions form an ellipse
Replies
9
Views
1K
Rotating an ellipse to create a spheroid?
Replies
2
Views
3K
Equation of hyperbola confocal with ellipse having same principal axes
Replies
4
Views
3K
How can the vertices of an ellipse be found using polar equations?
Replies
1
Views
1K
Optimization of the distance from the point on an ellipse
Replies
1
Views
1K
Equally inclined tangents of an ellipse
Replies
1
Views
2K
Calc III: minimize the area of an ellipse
Replies
8
Views
3K
Find locus of points near ellipse with some condition
Replies
5
Views
2K
Optimization of ellipse surrounding a circle
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top