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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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