यदि $\sec ^{-1}\left(\frac{5}{x}\right)+\sin ^{-1} \left(\frac{4}{5}\right)=\frac{\pi}{2}$,जहाँ $x \neq 0$,तो $x=$ . . . . . . .

  • A
    $3$
  • B
    $1$
  • C
    $5$
  • D
    $4$

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यदि $\sin ^{-1}\left(\frac{x}{5}\right)+\operatorname{cosec}^{-1}\left(\frac{5}{4}\right)=\frac{\pi}{2}$, तो $5+x=$

$\sinh^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$ किसके बराबर है?

यदि $y = \tan^{-1}\left(\frac{1}{x^2 + x + 1}\right) + \tan^{-1}\left(\frac{1}{x^2 + 3x + 3}\right) + \tan^{-1}\left(\frac{1}{x^2 + 5x + 7}\right) + \dots$ $n$ पदों तक है,तो $\frac{dy}{dx}$ का मान ज्ञात कीजिए।

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$\sin^{-1} \frac{1}{\sqrt{5}} + \cot^{-1} 3$ का मान ज्ञात कीजिए।

यदि $2 \tan^{-1}(\cos x) = \tan^{-1}(2 \operatorname{cosec} x)$ है,तो $x$ का मान ज्ञात कीजिए।

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