यदि $\alpha+\beta+\gamma=\pi$ है,तो व्यंजक $\sin^2 \alpha+\sin^2 \beta-\sin^2 \gamma$ का मान क्या है?

  • A
    $2 \sin \alpha \sin \beta \sin \gamma$
  • B
    $2 \cos \alpha \sin \beta \sin \gamma$
  • C
    $2 \sin \alpha \cos \beta \sin \gamma$
  • D
    $2 \sin \alpha \sin \beta \cos \gamma$

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