यदि $\sum_{n=1}^{2026} \tan^{-1}(\frac{1}{n^2+n+1}) = \tan^{-1}(1 - \frac{1}{x})$, जहाँ $x \neq 0$, तो $x = $

  • A
    $2028$
  • B
    $2026$
  • C
    $1014$
  • D
    $1013$

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$\sin \left[ \frac{\pi }{2} - \sin^{-1} \left( -\frac{\sqrt{3}}{2} \right) \right] = $

मान ज्ञात कीजिए: $\cos^{-1}(\cos \frac{4\pi}{3}) + \sin^{-1}(\sin \frac{4\pi}{3}) = \dots$

$S = \tan^{-1}\left( \frac{1}{n^2 + n + 1} \right) + \tan^{-1}\left( \frac{1}{n^2 + 3n + 3} \right) + \dots + \tan^{-1}\left( \frac{1}{1 + (n + 19)(n + 20)} \right)$ है,तो $\tan S$ का मान ज्ञात कीजिए।

यदि $3 \tan^{-1} x + \cot^{-1} x = \pi$ है,तो $x$ का मान ज्ञात कीजिए।

यदि $\cot(\cos^{-1} x) = \sec(\tan^{-1} \frac{a}{\sqrt{b^2 - a^2}})$ है, तो $x$ का मान है

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