જો $A + B = 225^\circ$ હોય,તો $\frac{{\cot A}}{{1 + \cot A}} \cdot \frac{{\cot B}}{{1 + \cot B}} = $

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $1/2$

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