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

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

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Similar Questions

જો $y = \tan^{-1}(\sec x^3 - \tan x^3)$ અને $\frac{\pi}{2} < x^3 < \frac{3\pi}{2}$ હોય,તો:

$\cos \left(\cos ^{-1} \frac{1}{3}+\cos ^{-1} \frac{1}{5}\right)+\cos \left(\sin ^{-1} \frac{1}{3}+\sin ^{-1} \frac{1}{5}\right) =$ . . . . . . .

$\tan \left[ \cos^{-1} \frac{4}{5} + \tan^{-1} \frac{2}{3} \right] =$

$\sin \left\{ {{\tan }^{ - 1}}\left( {\frac{{1 - {x^2}}}{{2x}}} \right) + {{\cos }^{ - 1}}\left( {\frac{{1 - {x^2}}}{{1 + {x^2}}}} \right) \right\}$ ની કિંમત શોધો.

જો $\sum_{n=1}^k \tan ^{-1}\left(\frac{1}{n^2+3 n+3}\right)=\tan ^{-1} \alpha$ હોય, તો $\alpha=$

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