જો $A + B + C = \pi$ હોય,તો $\frac{{\cos A}}{{\sin B\sin C}} + \frac{{\cos B}}{{\sin C\sin A}} + \frac{{\cos C}}{{\sin A\sin B}} = $

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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