$\cot 12^{\circ} \cot 102^{\circ} + \cot 102^{\circ} \cot 66^{\circ} + \cot 66^{\circ} \cot 12^{\circ}$ का मान ज्ञात कीजिए।

  • A
    $-2$
  • B
    $1$
  • C
    $-1$
  • D
    $2$

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