Maths-
General
Easy

Question

If a=Cis⁡ α,b=Cis⁡ β c=Cis γ and fraction numerator left parenthesis b plus c right parenthesis left parenthesis c plus a right parenthesis left parenthesis a plus b right parenthesis over denominator a b c end fraction equals
K cos invisible function application open parentheses fraction numerator alpha minus beta over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator beta minus gamma over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator gamma minus alpha over denominator 2 end fraction close parentheses then K= (H.W)

  1. 2
  2. 22
  3. 23
  4. 24

The correct answer is: 22

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