$\cos \frac{\pi}{2^2} \cdot \cos \frac{\pi}{2^3} \cdot \cos \frac{\pi}{2^4} \cdots \cos \frac{\pi}{2^{10}} = $

  • A
    $\frac{\sin \left(\frac{\pi}{2^{10}}\right)}{512}$
  • B
    $\frac{\operatorname{cosec}\left(\frac{\pi}{2^{10}}\right)}{512}$
  • C
    $\frac{\sin \left(\frac{\pi}{2^{10}}\right)}{1024}$
  • D
    $\frac{\operatorname{cosec}\left(\frac{\pi}{2^{10}}\right)}{1024}$

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