AP EAMCET · Maths · Circle
The length of the transverse common tangent of the circles and is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
Let, C1≡x2+y2-2x+4y+4=0 Centre, c2≡1,-2 and radius r1=1 C2≡x2+y2+4x-2y+1=0 Centre, c1≡-2,1 and radius r2=2 Now, distance between centres is given by c1c2=-2-12+1+22=18 Now, we know that the length of transverse common tangent is given by c1c22-r1+r22…
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