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      Question

      What is the value of sin (B – C) cos (A – D)

      + sin (A – B) cos (C – D) + sin (C – A) cos (B – D)?
      A 3/2 Correct Answer Incorrect Answer
      B -3 Correct Answer Incorrect Answer
      C 1 Correct Answer Incorrect Answer

      Solution

      Here we can absorve a symmetry = A = B = C = D = 0 = sin 0 cos 0 + sin 0 cos 0 + sin 0 cos 0 = 0 + 0 + 0 = 0

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