$\int_{0}^{\pi /2} \{ x - [\sin x] \} \,dx$ का मान ज्ञात कीजिए।

  • A
    $\frac{\pi^2}{8}$
  • B
    $\frac{\pi^2}{8} - 1$
  • C
    $\frac{\pi^2}{8} - 2$
  • D
    इनमें से कोई नहीं

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