જો $4\sin^{-1}x + \cos^{-1}x = \pi$ હોય,તો $x$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $\frac{1}{2}$
  • C
    $-\frac{\sqrt{3}}{2}$
  • D
    $\frac{1}{\sqrt{2}}$

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

સાબિત કરો કે $\tan ^{-1}\left(\frac{\sqrt{1+x}-\sqrt{1-x}}{\sqrt{1+x}+\sqrt{1-x}}\right)=\frac{\pi}{4}-\frac{1}{2} \cos ^{-1} x$,જ્યાં $-\frac{1}{\sqrt{2}} \leq x \leq 1$.

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$\sin^{-1} \frac{1}{\sqrt{5}} + \cot^{-1} 3$ ની કિંમત શોધો.

વિધાન-$1$: ${\cot ^{ - 1}}\left[ {\frac{{\log (e/{x^2})}}{{\log (ex^2)}}} \right] + {\cot ^{ - 1}}\left[ {\frac{{\log (ex^2)}}{{\log (e/{x^2})}}} \right] = \frac{\pi}{2}$
વિધાન-$2$: ${\tan ^{ - 1}}\left[ {\frac{{1 + \log {x^2}}}{{1 - \log {x^2}}}} \right] = {\tan ^{ - 1}}1 + {\tan ^{ - 1}}(\log {x^2})$

કિંમત શોધો: ${\tan ^{ - 1}}\left[ {\frac{{\cos x}}{{1 + \sin x}}} \right]$

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