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If the length of the tangent from two po...

If the length of the tangent from two points A,B to a circle are 6,7 respectively. If A,B are conjugate points then AB=

A

`85`

B

`42`

C

`sqrt(85)`

D

`sqrt(13)`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-CIRCLES-EXERCISE II
  1. Assertion (A): A line through the point P(5,10) cut the line x+2y=5 at...

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  2. The polar of a point P w.r.t. a circle of radius a touching both x and...

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  3. If the length of the tangent from two points A,B to a circle are 6,7 r...

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  4. For the circle x^(2)+y^(2)-2x-4y-4=0, then lines 2x+3y-1=0, 2x+y+5=0 a...

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  5. The conjugate line 3x+4y-45=0 with respect to x^(2)+y^(2)-6x-8y+5=0 wh...

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  6. The locus of the poles of the line ax+by+c=0 w.r.t a system of circles...

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  7. The locus of poles of tangents to the circle x^(2)+y^(2)=a^(2) w.r.t t...

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  8. A point P is taken on the circle x^(2)+y^(2)=a^(2) and PN, PM are draw...

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  9. The inverse point of (2,-3) w.r.t to circle x^(2)+y^(2)+6x-4y-12=0 is

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  10. If the inverse of P(-3,5) w.r.t to a circle is (1,3) then polar of P w...

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  11. The inverse point of (1,2) origin w.r.t. the circle x^(2)+y^(2)-4x-6y+...

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  12. If the tangent at (3,-4) to the circle x^(2)+y^(2)-4x+2y-5=0 cuts the ...

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  13. The least length of chord passing through (2,1) of the circle x^(2)+y^...

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  14. The locus of midpoints of the chord of the circle x^(2)+y^(2)=25 which...

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  15. The locus of the mid points of the chords of x^(2)+y^(2)=a^(2) which ...

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  16. Locus of mid points of chords to the circle x^(2)+y^(2)-8x+6y+20=0 whi...

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  17. From origin chords are drawn to the cirlce x^(2)-y^(2)-2px=0 then locu...

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  18. The equation to the locus of the midpoints of chords of the circle x^(...

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  19. The locus of the midpoint of the chord of the circle x^(2)+y^(2)-2x-2y...

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  20. Let C be the circle with centre (0,0) and radius 3 units. The equation...

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