जब $x > 0$ हो,तब $\int \cos^{-1}\left(\frac{1-x^{2}}{1+x^{2}}\right) dx$ का मान क्या है?

  • A
    $2[x \tan^{-1} x - \frac{1}{2} \log(1+x^{2})] + C$
  • B
    $2[x \tan^{-1} x + \frac{1}{2} \log(1+x^{2})] + C$
  • C
    $2x \tan^{-1} x + \log(1+x^{2}) + C$
  • D
    $2x \tan^{-1} x - \log(1+x^{2}) + C$

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मान ज्ञात कीजिए: $\int u \frac{d^2v}{dx^2} dx - \int v \frac{d^2u}{dx^2} dx$

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