$3 \tan^{-1}(1/2)$ का मान किसके बराबर है?

  • A
    $\tan^{-1}(5/2)$
  • B
    $\tan^{-1}(2/5)$
  • C
    $\cot^{-1}(11/2)$
  • D
    $\tan^{-1}(11/2)$

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