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A tangent is drawn to the ellipse to cut...

A tangent is drawn to the ellipse to cut the ellipse `x^2/a^2+y^2/b^2=1` and to cut the ellipse `x^2/c^2+y^2/d^2=1` at the points P and Q. If the tangents are at right angles, then the value of `(a^2/c^2)+(b^2/d^2)` is

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CENGAGE PUBLICATION-CONIC SECTIONS-All Questions
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  2. Find the equations of the asymptotes of the hyperbola 3x^(2)+10xy+8y...

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  3. A tangent is drawn to the ellipse to cut the ellipse x^2/a^2+y^2/b^2=1...

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  7. If (asectheta;btantheta) and (asecphi; btanphi) are the ends of the fo...

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  8. Find the area of the triangle formed by any tangent to the hyperbola (...

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  9. If a triangle is inscribed in an ellipse and two of its sides are pa...

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  10. Normal are drawn to the hyperbola (x^2)/(a^2)-(y^2)/(b^2)=1 at point t...

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  11. The tangent at a point P(acosvarphi,bsinvarphi) of the ellipse (x^2)/(...

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  12. Find the product of the length of perpendiculars drawn from any point ...

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  13. Tangents are drawn to the ellipse from the point ((a^2)/(sqrt(a^2-b^2)...

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  15. Find the point (alpha,beta) on the ellipse 4x^2+3y^2=12 , in the first...

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

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  18. Let E be the ellipse (x^2)/9+(y^2)/4=1 and C be the circle x^2+y^2=9 ....

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  19. Two straight lines rotate about two fixed points. If they start from t...

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