Maths-
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Question

If ABC is a triangle and tan space A over 2 comma tan space B over 2 comma tan space C over 2 are H.P then the minimum value of  cot space B over 2 is equal to

  1. negative square root of 3
  2. square root of 3
  3. 2
  4. -2

The correct answer is: square root of 3

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