${\tan ^{ - 1}}\left[ {\cos \left( {2\,{{\tan }^{ - 1}}\frac{3}{4}} \right)\, + \,\sin \,\left( {2\,{{\cot }^{ - 1}}\frac{1}{2}} \right)} \right]$ का मान क्या है?

  • A
    वास्तविक नहीं है
  • B
    $\frac{\pi }{4}$ के बराबर
  • C
    $\frac{\pi }{4}$ से अधिक
  • D
    $\frac{\pi }{4}$ से कम

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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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यदि $y = \tan^{-1} \left( \frac{4x}{1 + 5x^2} \right) + \tan^{-1} \left( \frac{2 + 3x}{3 - 2x} \right)$ है,तो $\frac{dy}{dx} = $

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