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If the tangents at (5,12) and (12,-5) to...

If the tangents at (5,12) and (12,-5) to a circle are perpendicular to each other then the radius of the circle is

A

12

B

5

C

13

D

none

Text Solution

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-CIRCLE-Exercise 1B(Circle-Line)
  1. If a tangnet drawn from the point (4,0) to the circle x^(2)+y^(2)=8 to...

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  2. The tangent at (3,4), (4,-3) to the circle x^(2)+y^(2)=25" are"

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  3. If the tangents at (5,12) and (12,-5) to a circle are perpendicular to...

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  4. The locus of the point of intersection of two perpendicular tangents t...

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  5. The locus of the point of intersection of the perpendicular tangents t...

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  6. The locus of the point of intersection of the perpendicular tangents t...

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  7. If the tangent from a point P to the circle x^(2)+y^(2)=1 is perpendic...

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  8. The locus of the point of intersection of two tangents drawn to the ci...

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  9. The locus of the feet of the perpendicular drawn from the point (a,0) ...

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  10. The locus of the middle points of portions of the tangents to the circ...

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  11. If 4t^(2)-5m(2)+6l+1=0, then the line lx+my+1=0 touches the circle

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  12. The locus of the point (l,m) if the line lx+my=1 touches the circles x...

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  13. A tangent to the circle x^(2)+y^(2)=4 meets the coordinate axes at P a...

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  14. The tangents to x^(2)+y^(2)=a^(2) having inclinations alpha and beta i...

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  15. A line segment AM=a moves in the XOY plane such that AM is parallel to...

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  16. The circle 4x^(2)+4y^(2)-12x-12y+9=0

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  17. If x^(2)+y^(2)-4x-6y+k=0 touches x-axis then k=

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  18. If x^(2)+y^(2)+6x+2ky+25=0 to touch y-axis then k=

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  19. Find the equation of the circle with centre (-3, 4) and touching y-...

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  20. Find the equation of the circle with centre (-3, 4) and touching y-...

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