$\tan 20^\circ \cot 10^\circ \cot 50^\circ$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{\sqrt{3}}$
  • B
    $\sqrt{3}$
  • C
    $\frac{\sqrt{3}}{4}$
  • D
    $4\sqrt{3}$

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