मान लीजिए $[t]$ महत्तम पूर्णांक $\leq t$ को दर्शाता है। तब $\frac{2}{\pi} \int_{\pi/6}^{5\pi/6} (8[\operatorname{cosec} x] - 5[\cot x]) \, dx$ का मान ज्ञात कीजिए।

  • A
    $12$
  • B
    $14$
  • C
    $16$
  • D
    $18$

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