If A, B and C be the angles of a triangle, then out of the following, the incorrect relation is:

  1. cot ((A+B)/2) =tan C/2
  2. cos ((A+B)/2)=sin (C/2)
  3. sin((A+B)/2) =cos (C/2)
  4. tan ((A+B)/2) = sec (C/2)
Monis Rasool Professor Asked on 20th November 2015 in Maths.
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2 Answer(s)

Answer: (4) tan (A + B)/2 = sec C/2

Anurag Mishra Professor Answered on 21st November 2015.
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sharpenough Default Answered on 12th December 2016.
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