$\int_0^\pi \frac{\theta \sin \theta}{1+\cos ^2 \theta} d \theta$ का मान ज्ञात कीजिए।

  • A
    $\frac{\pi^2}{2}$
  • B
    $\frac{\pi^2}{3}$
  • C
    $\pi^2$
  • D
    $\frac{\pi^2}{4}$

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$\int_{-1}^1 (a x^3 + b x) dx = 0$ के लिए

कथन $-1$: समाकलन $\int_{\frac{\pi}{6}}^{\frac{\pi}{3}} \frac{dx}{1 + \sqrt{\tan x}} = \frac{\pi}{6}$ का मान है।
कथन $-2$: $\int_{a}^{b} f(x) dx = \int_{a}^{b} f(a + b - x) dx$.

निश्चित समाकलनों के गुणों का उपयोग करके,$\int_{0}^{\frac{\pi}{2}} \frac{\sqrt{\sin x}}{\sqrt{\sin x}+\sqrt{\cos x}} d x$ का मान ज्ञात कीजिए।

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$\int_0^{\pi /2} \frac{d\theta}{1 + \tan \theta} = $

$\int_0^\pi \sin^2 x \, dx$ का मान ज्ञात कीजिए।

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