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If the lengths of the tangents from two points A, B to a circle are 4, 3 respectively. If A,B are conjugate points then AB=

A

5

B

`sqrt(85)`

C

`(sqrt(85))/2`

D

`(sqrt(85))/3`

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A
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AAKASH SERIES-CIRCLES-PRACTICE EXERCISE
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  7. The mixpoint of chord 2x+y-6=0 of circle x^(2)+y^(2)=9 is

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  9. The pair of tangents from (2,1) to the circle x^(2)+y^(2)=1 is

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  10. The midpoint of chord formed by the polar of (-9,2) w.r.t x^(2)+y^(2)=...

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  11. If (3,-2) is the midpoint of the chord AB of the circle x^(2)+y^(2)-4x...

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  12. Locus of midpoints of chords of circles x^(2)+y^(2)-4x-2y-4=0 which ar...

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  13. From the origin chords are drawn to the circle (x-1)^(2)+y^(2)=1 then ...

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  14. The locus of the midpoints oof chords of the circle x^(2)+y^(2)=4 whic...

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  15. Angle between tangents at the ends chords of circle (x-1)^(2)+(y-2)^(2...

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  16. The circle x^(2)+y^(2)-4x-6y-12=0, x^(2)+y^(2)+6x-8y+21=0 are

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  18. The number of common tangents to x^(2)+y^(2)=1, x^(2)+y^(2)-6x-8y+24=0...

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  20. The internal cent re of similitude of two circles (x-2)^(2)+(y-3)^(2)=...

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