$\lim _{n \rightarrow \infty} n \sin \frac{2 \pi}{3 n} \cos \frac{2 \pi}{3 n}$ का मान है

  • A
    $\frac{\pi}{6}$
  • B
    $\frac{2 \pi}{3}$
  • C
    $1$
  • D
    $\frac{\pi}{3}$

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