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If 3x+y=0 is a tangent to a circle whose...

If `3x+y=0` is a tangent to a circle whose center is `(2,-1)` , then find the equation of the other tangent to the circle from the origin.

A

`x-3y=0`

B

`x+3y=0`

C

`3x-y=0`

D

`2x+y=0`

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The correct Answer is:
A
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OBJECTIVE RD SHARMA ENGLISH-CIRCLES-Exercise
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  9. Two lines through (2, 3) from which the circle x^2+y^2 =25 intercepts ...

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  12. If the angle of intersection of the circle x^2+y^2+x+y=0 and x^2+y^2+x...

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  13. Find the equation of the circle whose radius is 5a n d which touches t...

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  14. If AB is a diameter of a circle and C is any point on the circle, then...

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  17. If the tangents are drawn to the circle x^2+y^2=12 at the point where ...

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  18. If the straight line x=2y+1=0 intersects the circle x^2+y^2=25 at poin...

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  19. If the chord of contact of the tangents drawn from the point (h , k) t...

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  20. Find the equation of the circle which cuts the three circles x^2+y^2-3...

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