$3 \tan^{-1}(1/2)$ ની કિંમત કોના બરાબર છે?

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

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જો $y = \cos^{-1}\left(\frac{2x}{1+x^2}\right)$ હોય,તો $\frac{dy}{dx}$ શોધો,જ્યાં $-1 < x < 1$.

$\tan ^{-1} \sqrt{3} - \cot ^{-1}(-\sqrt{3}) = $ . . . . . . .

જો $\operatorname{Tan}^{-1} \frac{1}{3}+\operatorname{Tan}^{-1} \frac{1}{7}+\operatorname{Tan}^{-1} \frac{1}{13}+\ldots+\operatorname{Tan}^{-1} \frac{1}{n^2+n+1}=\operatorname{Tan}^{-1} \theta$ હોય,તો $\theta=$

$\tan^{-1}\left(\frac{1}{11}\right) + \tan^{-1}\left(\frac{2}{12}\right) = $

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$\operatorname{cosec}^{-1}(\sqrt{2})+\cos ^{-1}\left(\frac{-1}{2}\right)-\sec ^{-1}\left(\frac{2}{\sqrt{3}}\right)$ નું મૂલ્ય કેટલું થાય?

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