Question

    A 4 Correct Answer Incorrect Answer
    B 7/4 Correct Answer Incorrect Answer
    C 5 Correct Answer Incorrect Answer
    D 17/2 Correct Answer Incorrect Answer

    Solution

    Sin3 A sec(A + 10) = 1 3A + A + 10 = 900 4A = 800 A = 200 = 2 × cosec 3 ×20 / 2 + 6 sin2  600 – 3/2 tan2  60 = 2 × 2 + 6 × ¾ - 3/2 × 3 = 4 + 9/2 – 9/2 = 4

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