જો $f(n) = \tan \left[\tan ^{-1} \frac{1}{1+2} + \tan ^{-1} \frac{1}{1+6} + \tan ^{-1} \frac{1}{1+12} + \ldots + \tan ^{-1} \frac{1}{1+n(n+1)}\right]$ હોય,તો $f(2021) =$

  • A
    $\frac{2020}{2022}$
  • B
    $\frac{2022}{2024}$
  • C
    $\frac{2021}{2023}$
  • D
    $\frac{2019}{2021}$

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Similar Questions

$4 \tan ^{-1} \frac{1}{5}-\tan ^{-1} \frac{1}{70}+\tan ^{-1} \frac{1}{99}=$

$\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2(2)}-1}{\tan (2)}\right)-\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2\left(\frac{1}{2}\right)}+1}{\tan \left(\frac{1}{2}\right)}\right)$ ની કિંમત શોધો.

$x$ ની સાપેક્ષમાં $\cos^{-1} \left( \sqrt{\frac{1+x}{2}} \right)$ નું વિકલન સહગુણક શું છે?

વિધેયને તેના સરળ સ્વરૂપમાં લખો: $\tan ^{-1}\left(\frac{1}{\sqrt{x^{2}-1}}\right), |x|>1$

જો $2 \tan^{-1}(\cos x) = \tan^{-1}(2 \operatorname{cosec} x)$ હોય,તો $x$ ની કિંમત શોધો.

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