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    Question

    Find the value of sin²50° +

    sin²40°.
    A 1/2 Correct Answer Incorrect Answer
    B 1 Correct Answer Incorrect Answer
    D 2 Correct Answer Incorrect Answer

    Solution

    sin²40° = cos²50°
    Also we know that sin²A + cos²A = 1
    sin²50° + cos²50 = 1

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