यदि $y = \sin^{-1}\left(\frac{19}{20}x\right) + \cos^{-1}\left(\frac{19}{20}x\right)$ है,तो $\frac{dy}{dx} = $

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    इनमें से कोई नहीं

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${\sin ^{ - 1}}\frac{4}{5} + 2{\tan ^{ - 1}}\frac{1}{3} = $

यदि $\sin ^{-1}\left(\frac{3}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)=\sin ^{-1} \alpha$ है,तो $\alpha=$

सिद्ध कीजिए कि $\sin^{-1}(2x\sqrt{1-x^2}) = 2\sin^{-1}x$,जहाँ $-\frac{1}{\sqrt{2}} \leq x \leq \frac{1}{\sqrt{2}}$.

$\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{5}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{8}\right)$ का मान है

$\cot \left(\operatorname{cosec}^{-1} \frac{5}{3}+\tan ^{-1} \frac{2}{3}\right)$ का मान ज्ञात कीजिए।

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