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AP EAMCET · Maths · Circle

Two circles each of radius 5 units touch each other at (1,2) and 4x+3y=10 is their common tangent. The equation of that circle among the two given circles, such that some portion of it lies in every quadrant is

  1. A x2+y2+6x+2y+15=0
  2. B x2+y2+2x+6y-15=0
  3. C x2+y2+6x+2y-15=0
  4. D x2+y2-6x+2y-15=0
Verified Solution

Answer & Solution

Correct Answer

(C) x2+y2+6x+2y-15=0

Step-by-step Solution

Detailed explanation

The figure below represents the two circles with the common tangent.  The slope of the common tangent,  m=-43  The slope of the line perpendicular to tangent is,  m'=tanθ=34  Therefore, sinθ=35,cosθ=45  Now, …