यदि $\tan A = -\frac{1}{2}$ और $\tan B = -\frac{1}{3}$ है,तो $A + B = $

  • A
    $\frac{\pi}{4}$
  • B
    $\frac{3\pi}{4}$
  • C
    $\frac{5\pi}{4}$
  • D
    इनमें से कोई नहीं

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