यदि $0 \leq A, B \leq \frac{\pi}{4}$ और $\cot A + \cot B + \tan A + \tan B = \cot A \cot B - \tan A \tan B$ है,तो $\sin(A + B) = $

  • A
    $0$
  • B
    $\frac{1}{2}$
  • C
    $\frac{1}{\sqrt{2}}$
  • D
    $\frac{\sqrt{3}}{2}$

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