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     EduGorilla 
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    If sin A + sin 2A = x and cos A + cos 2A = y, then (x2 + y2) (x2 + y2 – 3) is equal to

    Options :-

    1. 2y
    2. y
    3. 3y
    4. None of these
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Reply To: If sin A + sin 2A = x and cos A + cos 2A = y, then (x2 + y2) (x2 + y2 – 3) is equal to….
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