TS EAMCET · Maths · Circle
The lines represented by are normals to a circle . If this circle touches the circle externally, then the equation of the chord of contact of centre of with respect to is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
S'≡x2+y2-2x+2y-7=0 c1(-1,-1), r1 =1+1+7=3 Now a pair of lines 5x2-xy-5x+y=0 are normally to circle S=0 We know that normals of a circle intersect at centre To find the intersection point P=5x2-xy-5x+y=0 dPdx=10x-y-5=0 dPdy=-x+1=0 So x=1, y=5 c2(1, 5)…
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