જો $\sin A + \sin 2A = x$ અને $\cos A + \cos 2A = y$ હોય,તો $({x^2} + {y^2})({x^2} + {y^2} - 3) = $

  • A
    $2y$
  • B
    $y$
  • C
    $3y$
  • D
    આમાંથી કોઈ નહીં

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