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Grade 12Algebra

the pair of tangent from (2,1) to the circle x^2+y^2=4^2 is
  1. 3x^2+4xy+16x+8y+20=0
  2. 3x^2+4xy+16x-8y+20=0
  3. 3x^2+4xy-16x-8y+20=0
  4. 3x^2-4xy-16x+8y-20=0
please give a proper solution

Profile image of Mrunal Sonawane
7 Years agoGrade 12
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1 Answer

Profile image of Arun
ApprovedApproved Tutor Answer7 Years ago
Dear student
 
Pair of tangents
S S1= T2
 
Use this formula and you will clearly get the answer.
In case o f any difficulty, please feel free to ask

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