$\frac{1}{2}{\cos ^{ - 1}}\left( {\frac{{1 - x}}{{1 + x}}} \right) = $

  • A
    ${\cot ^{ - 1}}\sqrt x $
  • B
    ${\tan ^{ - 1}}\sqrt x $
  • C
    ${\tan ^{ - 1}}x$
  • D
    ${\cot ^{ - 1}}x$

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સાબિત કરો કે $\cot ^{-1}\left(\frac{\sqrt{1+\sin x}+\sqrt{1-\sin x}}{\sqrt{1+\sin x}-\sqrt{1-\sin x}}\right)=\frac{x}{2}$,જ્યાં $x \in\left(0, \frac{\pi}{4}\right)$.

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જો $\pi \leq x \leq 2 \pi$ હોય,તો $\cos^{-1}(\cos x)$ બરાબર શું થાય :-

જો $\sin^{-1} \frac{1}{3} + \sin^{-1} \frac{2}{3} = \sin^{-1} x$ હોય,તો $x$ ની કિંમત શોધો.

જો $y = \sin^{-1} \left( \frac{5x + 12\sqrt{1-x^2}}{13} \right)$ હોય,તો $\frac{dy}{dx} = $

$\cos \left[\cos ^{-1}\left(-\frac{1}{7}\right)+\sin ^{-1}\left(-\frac{1}{7}\right)\right]$ ની કિંમત શોધો.

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