${\sin ^{ - 1}}\left[ {\sin \left( {\frac{{2\pi }}{3}} \right)} \right]$ का मुख्य मान क्या है?

  • A
    $-\frac{2\pi}{3}$
  • B
    $\frac{2\pi}{3}$
  • C
    $\frac{4\pi}{3}$
  • D
    $\frac{\pi}{3}$

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