TS EAMCET · Maths · Circle
If a circle passing through the point touches the circle externally at the point then the radius of is
- A
- B
- C
- D
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Correct Answer
(A)
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Given equation of circle : x2+y2+4x-6y=12 Now equation of tangent to this circle at 1,-1 is T=0⇒x-y+4 x+12-6 y-12=12 ⇒x-y+2x+2-3y+3=12 ⇒3x-4y-7=0 Now equation of circle touching the line 3x-4y-7=0 at 1, -1 is…
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