यदि $\int f(x) \cos x \, dx = \frac{1}{2} [f(x)]^2 + C$ और $f(0) = 0$ है, तो $f'(0) = $

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $2$

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यदि $\int \frac{(x^2-1)}{(x+1)^2 \sqrt{x(x^2+x+1)}} dx = A \tan^{-1}\left(\sqrt{\frac{x^2+x+1}{x}}\right) + C$, जहाँ $C$ एक स्थिरांक है, तो $A$ का मान ज्ञात कीजिए।

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$ \int \frac{1}{x^{2}\left(x^{4}+1\right)^{3 / 4}} dx $ का मान ज्ञात कीजिए।

$\int \sqrt{\frac{1-x}{1+x}} \, dx = $

यदि $\int \frac{\sin \theta}{\sin 3 \theta} d \theta = \frac{1}{2 k} \log \left|\frac{k+\tan \theta}{k-\tan \theta}\right|+c$ है,तो $k=$

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