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General
Easy

Question

If the sides be a, b, c then (r + r1) tanfraction numerator B minus C over denominator 2 end fraction+(r + r2) tanfraction numerator C minus A over denominator 2 end fraction+ (r+ r3) tanfraction numerator A minus B over denominator 2 end fraction =

  1. 1  
  2. 0  
  3. 2  
  4. 4  

The correct answer is: 0

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