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    Question

    Find the value of sin²33° + sin²57° + cos²48° +

    cos²42°.
    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

    sin²33° + sin²(90° − 33°) + cos²48° + cos²(90° − 48°)
    = sin²33° + cos²33° + cos²48° + sin²48°
    = 1 + 1 = 2

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