$\cot\, x + \cot\, (60^\circ + x) + \cot\, (120^\circ + x)$ का मान किसके बराबर है?

  • A
    $\cot\, 3x$
  • B
    $\tan\, 3x$
  • C
    $3\, \cot\, 3x$
  • D
    $3\, \tan\, 3x$

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