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Two concentric ellipses are such that th...

Two concentric ellipses are such that the foci of one are on the other and their major axes are equal. Let `ea n de '` be their eccentricities. Then. the quadrilateral formed by joining the foci of the two ellipses is a parallelogram the angle `theta` between their axes is given by `theta=cos^(-1)sqrt(1/(e^2)+1/(e^('2))=1/(e^2e^('2)))` If `e^2+e^('2)=1,` then the angle between the axes of the two ellipses is `90^0` none of these

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ARIHANT MATHS ENGLISH-ELLIPSE-Exercise (Questions Asked In Previous 13 Years Exam)
  1. Two concentric ellipses are such that the foci of one are on the other...

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  2. The minimum area of the triangle formed by the tangent to (x^2)/(a^2)+...

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  3. about to only mathematics

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  4. An ellipse has O B as the semi-minor axis, Fa n dF ' as its foci...

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  5. In an ellipse, the distances between its foci is 6 and minor axis is 8...

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  6. about to only mathematics

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  7. A focus of an ellipse is at the origin. The directrix is the line x =4...

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  8. The line passing through the extremity A of the major exis and extremi...

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  9. The normal at a point P on the ellipse x^2+4y^2=16 meets the x-axis at...

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  10. A triangle A B C with fixed base B C , the vertex A moves such that co...

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  11. The conic having parametric representation x=sqrt3(1-t^(2)/(1+t^(2))),...

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  12. The ellipse x^2+""4y^2=""4 is inscribed in a rectangle aligned with...

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  13. Tangents are drawn from the point P(3,4) to the ellipse x^(2)/9+y^(2)/...

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  14. Tangents are drawn from the point P(3,4) to the ellipse x^(2)/9+y^(2)/...

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  15. Tangents are drawn from the point P(3,4) to the ellipse x^(2)/9+y^(2)/...

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  16. Find the equation of an ellipse hose axes lie along the coordinate ...

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  17. The ellipse E1:(x^2)/9+(y^2)/4=1 is inscribed in a rectangle R whose s...

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  18. Statement 1: An equation of a common tangent to the parabola y^2=16s...

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  19. An ellipse is drawn by taking a diameter of the circle (x-1)^2+y^2=1 ...

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  20. the equation of the circle passing through the foci of the ellip...

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  21. A vertical line passing through the point (h, 0) intersects the ellips...

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