$\int x \cos x \, dx = $

  • A
    $x \sin x + \cos x + C$
  • B
    $x \sin x - \cos x + C$
  • C
    $x \cos x + \sin x + C$
  • D
    $x \cos x - \sin x + C$

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$ \int x^{3} \sin 3 x \, dx = $

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$\int \operatorname{Cos}^{-1}\left(\frac{1-x^2}{1+x^2}\right) d x=$

यदि रैखिक फलन $f(x)$ और $g(x)$ समीकरण $\int[(3x-1) \cos x + (1-2x) \sin x] dx = f(x) \cos x + g(x) \sin x + C$ को संतुष्ट करते हैं,तो:

$\int \tan ^{-1}\left(\sqrt{\frac{1-x}{1+x}}\right) d x$ का मान ज्ञात कीजिए।

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