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

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

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