मान ज्ञात कीजिए: ${\tan ^{ - 1}}x + {\cot ^{ - 1}}(x + 1)$

  • A
    ${\tan ^{ - 1}}({x^2} + 1)$
  • B
    ${\tan ^{ - 1}}({x^2} + x)$
  • C
    ${\tan ^{ - 1}}(x + 1)$
  • D
    ${\tan ^{ - 1}}({x^2} + x + 1)$

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