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In the ellipse 9x^(2) + 5y^(2) =45 , the...

In the ellipse `9x^(2) + 5y^(2) =45` , the distance between the foci is

A

`4 sqrt(5)`

B

` 3 sqrt(5)`

C

3

D

4

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The correct Answer is:
D
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HIMALAYA PUBLICATION-ELLIPSE-QUESTION BANK
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  2. The distance between the foci of the ellipse 5 x^(2)+9 y^(2)=45 is

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  3. In the ellipse 9x^(2) + 5y^(2) =45 , the distance between the foci is

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  4. If the latus rectum of the ellipse x^(2) tan ^(2) alpha+y^(2) sec ^(2)...

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  5. The vertices of the ellipse 4 x^(2)+y^(2)-16 x-6 y-39=0

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  6. The centre of the ellipse 8 x^(2)+6 y^(2)-16 x+12 y-34=0 is

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  7. The length of the major axis of 4 x^(2)+9 y^(2)+8 x+36 y+4=0 is

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  8. The length of the minor axis of 3 x^(2)+4 y^(2)+6 x-8 y-5=0

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  9. The eccentricity of the ellipse 8 x^(2)+6 y^(2)-16 x+12 y-34=0 is

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  10. The eccentricity of the ellipse 4 x^(2)+9 y^(2)-24 x+36 y+36=0 is

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  11. The equations of the directrices of the ellipse 3 x^(2)+4 y^(2)+6 x-8 ...

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  12. Centre of the ellipse 3 x^(2)+4 y^(2)+6 x+16 y-29=0 is at

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  13. (2,4) and (10,10) are the ends of a latus rectum of an ellipse withe=(...

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  14. In an ellipse, minor axis =8 and e=(sqrt(5))/(3). Then the major axis ...

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  15. If the major axis of an ellipse is 3 times its minor axis its ecentric...

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  17. If y=m x+c is a tangent to (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 then b^(2...

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  18. The line 2 x+3 y=12 touches the ellipse 4 x^(2)+9 y^(2)=72 at

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  19. The condition that y=m x+c is a tangent to the ellipse (x^(2))/(a^(2))...

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  20. If (x)/(a)+(y)/(b)=sqrt(2) touches the ellipse (x^(2))/(a^(2))+(y^(2))...

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