$\int_{\pi / 6}^{\pi / 3} \cos^{-4} x \, dx =$

  • A
    $\frac{64}{9 \sqrt{3}}$
  • B
    $\frac{52 \sqrt{3}}{9}$
  • C
    $\frac{62 \sqrt{3}}{9}$
  • D
    $\frac{44}{9 \sqrt{3}}$

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निश्चित समाकल की परिभाषा द्वारा,$\lim _{n \rightarrow \infty}\left(\frac{1^4}{1^5+n^5}+\frac{2^4}{2^5+n^5}+\frac{3^4}{3^5+n^5}+\ldots+\frac{n^4}{n^5+n^5}\right)$ का मान ज्ञात कीजिए।

यदि $\int_0^b \frac{dx}{1+x^2} = \int_b^{\infty} \frac{dx}{1+x^2}$ है,तो $b$ का मान ज्ञात कीजिए।

$\mathop \smallint \limits_0^\pi \sqrt {1 + 4{{\sin }^2}\frac{x}{2} - 4\sin \frac{x}{2}} \;dx = $

$0 < x < \frac{\pi}{2}$ के लिए,समाकलन $\int_{\frac{1}{2}}^{\frac{\sqrt{3}}{2}} \ln(e^{\cos x}) \, d(\sin x)$ का मान ज्ञात कीजिए:

$\int_{0}^{\pi / 2} \frac{\cos 3 x+1}{2 \cos x-1} d x$ का मान है

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