$\sin(\cot^{-1}(\tan(\cos^{-1}x)))$ નું મૂલ્ય કેટલું થાય?

  • A
    $x$
  • B
    $\frac{x}{2}$
  • C
    $2x$
  • D
    આમાંથી કોઈ નહીં

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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 $f(2021) =$

$\tan \left\{\frac{1}{2} \cos ^{-1} \frac{\sqrt{5}}{3}\right\}$ ની કિંમત શોધો.

$\cot ^{-1}\left[\frac{\sqrt{1-\sin x}+\sqrt{1+\sin x}}{\sqrt{1-\sin x}-\sqrt{1+\sin x}}\right]$ ની કિંમત શોધો,જ્યાં $x \in\left(0, \frac{\pi}{4}\right)$ છે.

$x$ ની સાપેક્ષમાં $\tan^{-1}\left(\frac{\sqrt{1+x^2}-1}{x}\right)$ નું વિકલન શોધો:

પદાવલિ $ \tan \left(\frac{1}{2} \cos ^{-1} \frac{2}{\sqrt{5}}\right) $ ની કિંમત શોધો.

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