$\sin\,10^o \sin\,30^o \sin\,50^o \sin\,70^o$ का मान है

  • A
    $\frac{1}{36}$
  • B
    $\frac{1}{32}$
  • C
    $\frac{1}{18}$
  • D
    $\frac{1}{16}$

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