$\cos \left(\sin ^{-1} \frac{1}{5}+\cos ^{-1} x\right)=0$ है,तो $x=$ . . . . . . .

  • A
    $0$
  • B
    $\frac{1}{5}$
  • C
    $5$
  • D
    $1$

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यदि $3{\sin ^{ - 1}}\frac{{2x}}{{1 + {x^2}}} - 4{\cos ^{ - 1}}\frac{{1 - {x^2}}}{{1 + {x^2}}} + 2{\tan ^{ - 1}}\frac{{2x}}{{1 - {x^2}}} = \frac{\pi }{3}$ है,तो $x$ =

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$\frac{d}{dx}(\sin^{-1}(3x - 4x^3)) = $

$\theta \in \left(0, \frac{\pi}{2}\right)$ के लिए, $\operatorname{sech}^{-1}(\cos \theta)$ का मान ज्ञात कीजिए।

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