AP EAMCET · Maths · Circle
The angle between the pair of tangents drawn from to the circle is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Given equation of circle is x2+y2+4x+4y-1=0 Centre-2,-2 OA=OB=r=4+4+1=3 Where r is radius of circle. OC=9+9=32 (by distance formula) ⇒OC2=OA2+CA2(Pythagoras theorem) ⇒CA2=9 Now, sinα=332=12 ⇒cosα=12 ⇒sin2α=2sinαcosα=1…
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