If A, B and C be the Angles of a Triangle :

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)
Anurag Mishra Professor Asked on 18th November 2015 in Maths.
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    Answer: (4) tan(A + B)/2 = Sec C/2

    Anurag Mishra Professor Answered on 18th November 2015.
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