$\sin (\beta + \gamma - \alpha ) + \sin (\gamma + \alpha - \beta ) + \sin (\alpha + \beta - \gamma ) - \sin (\alpha + \beta + \gamma ) = $

  • A
    $2\sin \alpha \sin \beta \sin \gamma $
  • B
    $4\sin \alpha \sin \beta \sin \gamma $
  • C
    $\sin \alpha \sin \beta \sin \gamma $
  • D
    इनमें से कोई नहीं

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