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If 3x+4y+k=0 is a tangent to the circle ...

If 3x+4y+k=0 is a tangent to the circle `x^(2)+y^2=16" then k"=`

A

`pm 20`

B

`-1,-5`

C

`pm 2`

D

4

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DIPTI PUBLICATION ( AP EAMET)-CIRCLE-Exercise 1B(Circle-Line)
  1. The normal of the circle (x- 2)^(2)+ (y- 1)^(2) =16 which bisects the ...

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  2. The normal drawn at P(-1, 2) on the circle x^(2) + y^(2) - 2x - 2y - 3...

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  3. If 3x+4y+k=0 is a tangent to the circle x^(2)+y^2=16" then k"=

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  4. If the line y=2x+c is a tangent to the circle x^(2)+y^(2)=5 then a val...

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  5. If x+y+k=0 is a tangent to the circle x^(2)+y^(2)-2x-4y+3=0" then k"=

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  6. The line x cos alpha+y sin alpha=p touches the circle x^(2)+y^(2)-2ax ...

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  7. The slope m of a tangent through the point (7,1) to the circle x^(2)+y...

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  8. The equation of the tangent to the circle x^(2)+y^(2)+2x+2y-7=0 which ...

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  9. Equation of the tangent to the circle x^(2)+y^(2)=3, which is inclined...

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  10. The radius of the circle which has the lines x+y-1=0 , x+y-9=0 as teng...

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  11. The radius of any circle touching the lines 3x-4y+5=0, 6x-8y-9=0" is "

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  12. If the lines 3x+4y-14=0 and 6x+8y+7=0 are both tangents to a circle, t...

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  13. How many circles can be drawn each touching all the three lines x+y=1,...

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  14. The number of circles that touches all the three lines x+y-1=0, x-y-1=...

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  15. If the equatio of one tangent to the circle with centre (2,-1) from th...

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  16. If y=3x is a tangent to a circle with centre (1,1) then the other tang...

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  17. The equation of the tangents to the circle x^(2)+y^(2)-4x-6y-12=0 and ...

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  18. The equation of the tangent to the circle x^(2)+y^(2)+8x-4y-5=0 and pe...

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  19. The equation of the tangents to the circle x^(2)+y^(2)-2x+8y-23=0 and ...

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  20. The equation of the tangent to the circle x^(2)+y^(2)=16 which are inc...

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