$\int_0^{\pi /2} {\frac{{\sin x\cos x\,dx}}{{{{\cos }^2}x + 3\cos x + 2}}} = $

  • A
    $\log \left( {\frac{8}{9}} \right)$
  • B
    $\log \left( {\frac{9}{8}} \right)$
  • C
    $\log (8 \times 9)$
  • D
    इनमें से कोई नहीं

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समाकल $\int_{\pi/6}^{\pi/3} \frac{4 - \csc^2 x}{\cos^4 x} dx$ का मान ज्ञात कीजिए:

यदि $f(x) = \begin{cases} 2x^2 + 1, & x \leq 1 \\ 4x^3 - 1, & x > 1 \end{cases}$ है, तो $\int_{0}^{2} f(x) dx$ का मान ज्ञात कीजिए।

यदि $\int_0^3 (3x^2 - 4x + 2) dx = k$ है, तो $3x^2 - 4x + 2 = \frac{3k}{5}$ का अंतराल $[0, 3]$ में स्थित मूल क्या है?

$\int_1^2 \left( \tan ^{-1}\left(\frac{x}{x^2+1}\right)+\tan ^{-1}\left(\frac{x^2+1}{x}\right) \right) d x =$

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