$\cos \frac{2 \pi}{15} \cos \frac{4 \pi}{15} \cos \frac{8 \pi}{15} \cos \frac{14 \pi}{15}$ का मान क्या है?

  • A
    $\frac{1}{16}$
  • B
    $\frac{1}{8}$
  • C
    $\frac{1}{12}$
  • D
    $\frac{1}{4}$

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