$x$ का मान ज्ञात कीजिए जिसके लिए $\sin \left(2 \tan ^{-1} \frac{3}{4}\right)=\cos \left(2 \tan ^{-1} x\right)$ है।

  • A
    $7$
  • B
    $\frac{3}{7}$
  • C
    $\frac{1}{7}$
  • D
    $\frac{4}{7}$

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अवकलज ज्ञात कीजिए: $\frac{d}{dx} \cos^{-1} \left( \frac{x - x^{-1}}{x + x^{-1}} \right)$

$\cos \left(\cos ^{-1} \frac{1}{3}+\cos ^{-1} \frac{1}{5}\right)+\cos \left(\sin ^{-1} \frac{1}{3}+\sin ^{-1} \frac{1}{5}\right) =$ . . . . . . .

यदि ${\tan ^{ - 1}}x + 2{\cot ^{ - 1}}x = \frac{{2\pi }}{3}$ है,तो $x =$ का मान ज्ञात कीजिए।

सिद्ध कीजिए कि $\tan ^{-1}\left(\frac{\sqrt{1+x}-\sqrt{1-x}}{\sqrt{1+x}+\sqrt{1-x}}\right)=\frac{\pi}{4}-\frac{1}{2} \cos ^{-1} x$,जहाँ $-\frac{1}{\sqrt{2}} \leq x \leq 1$.

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मान ज्ञात कीजिए: $\tan^{-1} \left( \frac{1 - x^2}{2x} \right) + \cos^{-1} \left( \frac{1 - x^2}{1 + x^2} \right)$

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