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    Question

    x, y be two acute angles, x + y < 90° and sin(2x -

    20°) = cos(2y + 20°), the value of tan(x + y) is 1.    √3 2.    1/√3 3.    1 4.    2+√2
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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