यदि $\sin (\alpha+\beta)=5 \sin (\alpha-\beta)$ है,तो $\frac{\sin 2 \beta}{5-\cos 2 \beta}=$

  • A
    $\tan (\alpha+\beta)$
  • B
    $\cot (\alpha+\beta)$
  • C
    $\cot (\alpha-\beta)$
  • D
    $\tan (\alpha-\beta)$

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