यदि $\sin A = n \sin (A + 2B)$ है,तो $\tan (A + B) =$

  • A
    $\frac{1+n}{1-n} \tan B$
  • B
    $\frac{1-n}{1+n} \tan B$
  • C
    $\frac{1+n}{n-1} \tan B$
  • D
    $\frac{n-1}{n+1} \tan B$

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