यदि $\sin ^{-1}\left(\frac{x}{13}\right)+\operatorname{cosec}^{-1}\left(\frac{13}{12}\right)=\frac{\pi}{2}$ है, तो $x$ का मान ज्ञात कीजिए।

  • A
    $5$
  • B
    $4$
  • C
    $12$
  • D
    $11$

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$\cos ^{-1}\left\{\frac{1}{\sqrt{2}}\left(\cos \frac{9 \pi}{10}-\sin \frac{9 \pi}{10}\right)\right\}$ का मान ज्ञात कीजिए।

यदि $2 \tan^{-1}(\cos x) = \tan^{-1}(\csc^2 x)$ है,तो $x =$

$2 \tan^{-1}(\cos x) = \tan^{-1}(\csc^2 x)$ है,तो $x = $

यदि $(\tan ^{-1} x)^2+(\cot ^{-1} x)^2=\frac{5 \pi^2}{8}$ है,तो $x^2+1=$

यदि $0 < x < \frac{1}{2}$ के लिए $y = 2\sin^{-1} \sqrt{1-x} + \sin^{-1} (2\sqrt{x(1-x)})$ है,तो $\frac{dy}{dx}$ का मान ज्ञात कीजिए।

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