જો $\int_0^{\frac{\pi}{2}} \frac{\cot x}{\cot x+\operatorname{cosec} x} d x=m(\pi+n)$ હોય,તો $(m \cdot n)$ ની કિંમત શોધો.

  • A
    $\frac{1}{2}$
  • B
    $-1$
  • C
    $-\frac{1}{2}$
  • D
    $1$

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