यदि किसी $x \in (-1, 1)$ के लिए $\sin^{-1} x = \frac{\pi}{5}$ है,तो $\cos^{-1} x$ का मान ज्ञात कीजिए।

  • A
    $\frac{3\pi}{10}$
  • B
    $\frac{5\pi}{10}$
  • C
    $\frac{7\pi}{10}$
  • D
    $\frac{9\pi}{10}$

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यदि $3 \sin^{-1}(\frac{2x}{1+x^2}) - 4 \cos^{-1}(\frac{1-x^2}{1+x^2}) + 2 \tan^{-1}(\frac{2x}{1-x^2}) = \frac{\pi}{3}$ है, तो $x$ का मान ज्ञात कीजिए।

यदि $\operatorname{Tan}^{-1} \frac{1}{3}+\operatorname{Tan}^{-1} \frac{1}{7}+\operatorname{Tan}^{-1} \frac{1}{13}+\ldots+\operatorname{Tan}^{-1} \frac{1}{n^2+n+1}=\operatorname{Tan}^{-1} \theta$ है,तो $\theta=$

यदि $\theta = \tan^{-1} a$,$\phi = \tan^{-1} b$ और $ab = -1$ है,तो $\theta - \phi = $

यदि $-1 < x < 1$ और $x \neq 0$ के लिए $\tan ^{-1}\left(\frac{2 x}{1-x^2}\right)+\cot ^{-1}\left(\frac{1-x^2}{2 x}\right)=\frac{\pi}{3}$ के सभी हलों का योग $\alpha-\frac{4}{\sqrt{3}}$ है,तो $\alpha$ का मान $..........$ है।

यदि $f(x) = \tan^{-1}\left\{ \frac{\log(e/x^2)}{\log(ex^2)} \right\} + \tan^{-1}\left( \frac{3 + 2\log x}{1 - 6\log x} \right)$ है,तो $\frac{d^n y}{dx^n}$ क्या होगा? $(n \ge 1)$

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