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asked in JEE by (49 points)

is (x-3)2 +(y+2)2 =5r2 to the circle (x-3)2 + (y+2)2 =r2 is 16 unit ,then the area between the two circles in sq. unit is : 

  • 32pi
  •  8pi
  •  4pi 
  • 256pi 
  • 16pi

1 Answer

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answered by (30.9k points)
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Best answer

Let point P(x1,y1) be any point on the circle, therefore it satisfy the circle  

(x1−3)2+(y1+2)2=5r2 ...(i) 

The length of the tangent drawn from point P(x1,y1) to the circle 

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