मान लीजिए $\cos (\alpha+\beta)=\frac{4}{5}$ और $\sin (\alpha-\beta)=\frac{5}{13}$,जहाँ $0 \leq \alpha, \beta \leq \frac{\pi}{4}$,तो $\tan 2 \alpha=$

  • A
    $\frac{19}{12}$
  • B
    $\frac{56}{33}$
  • C
    $\frac{25}{16}$
  • D
    $\frac{20}{7}$

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यदि $\cos(\alpha + \beta) = \frac{4}{5}$ और $\sin(\alpha - \beta) = \frac{5}{13}$,जहाँ $0 \le \alpha, \beta \le \frac{\pi}{4}$ है,तो $\tan 2\alpha = $

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