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     EduGorilla 
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    Which of the follwoing quadratic equations has  sin 18° and cos 36°  as roots?

    Options :-

    1. 4x2 + 25x + 1 = 0
    2. 4x2 - 25x - 1 = 0
    3. x2 + 25x + 1= 0
    4. 4x2 - 25x + 1 = 0
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