यदि $\tan A = \frac{5}{6}$ और $\tan B = \frac{1}{11}$ है,तो $A + B = $

  • A
    $\frac{-\pi}{4}$
  • B
    $\frac{-\pi}{3}$
  • C
    $\frac{\pi}{3}$
  • D
    $\frac{\pi}{4}$

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