જો $\tan ^{-1} x+\tan ^{-1} y=\frac{4 \pi}{5}$ હોય,તો $\cot ^{-1} x+\cot ^{-1} y$ ની કિંમત શોધો.

  • A
    $ \frac{\pi}{5} $
  • B
    $ \frac{2 \pi}{5} $
  • C
    $ \frac{3 \pi}{5} $
  • D
    $ \frac{4 \pi}{5} $

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કિંમત શોધો: $\tan ^{ - 1}\left(\frac{{{c_1}x - y}}{{{c_1}y + x}}\right) + \tan ^{ - 1}\left(\frac{{{c_2} - {c_1}}}{{1 + {c_2}{c_1}}}\right) + \tan ^{ - 1}\left(\frac{{{c_3} - {c_2}}}{{1 + {c_3}{c_2}}}\right) + ... + \tan ^{ - 1}\left(\frac{1}{{{c_n}}}\right)$

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જો $\tan^{-1}x + \tan^{-1}y + \tan^{-1}z = \pi$ હોય,તો $x + y + z$ ની કિંમત શું થાય?

જો $y = \cot^{-1} \left[ \frac{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}} \right]$ હોય,તો $\frac{dy}{dx} = $

જો ${\tan ^{ - 1}}x + 2{\cot ^{ - 1}}x = \frac{{2\pi }}{3}$ હોય,તો $x =$ શોધો.

જો $y = \sec^{-1}\left(\frac{1}{2x^2 - 1}\right)$ હોય,તો $\frac{dy}{dx}$ શોધો,જ્યાં $0 < x < \frac{1}{\sqrt{2}}$.

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