$\tan \left(2 \tan ^{-1} \frac{1}{5} + \sec ^{-1} \frac{\sqrt{5}}{2} + 2 \tan ^{-1} \frac{1}{8}\right)$ का मान ज्ञात कीजिए।

  • A
    $1$
  • B
    $2$
  • C
    $\frac{1}{4}$
  • D
    $\frac{5}{4}$

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सिद्ध कीजिए कि $\tan ^{-1} \frac{63}{16}=\sin ^{-1} \frac{5}{13}+\cos ^{-1} \frac{3}{5}$

$\cos \left[\sin ^{-1}\left(\frac{3}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)\right]=$

यदि $y = \cot^{-1} \left[ \frac{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}} \right]$ है,तो $\frac{dy}{dx} = $

यदि $2 \sin^{-1} x = \sin^{-1}(2x \sqrt{1-x^2})$ है,तो $x \in$ . . . . . . .

$x=\frac{1}{5}$ पर $\cos \left(2 \cos ^{-1} x+\sin ^{-1} x\right)$ का मान है

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