$n > 0$ के लिए,$\int_0^{2\pi } {\frac{{x{{\sin }^{2n}}x}}{{{{\sin }^{2n}}x + {{\cos }^{2n}}x}}\,dx = } $

  • A
    ${\pi ^{ - 1}}$
  • B
    $\pi $
  • C
    ${\pi ^{ - 2}}$
  • D
    ${\pi ^2}$

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मान लीजिए $g(t) = \int_{-\pi/2}^{\pi/2} \cos \left(\frac{\pi}{4} t + f(x)\right) \, dx$,जहाँ $f(x) = \log_e \left(x + \sqrt{x^2 + 1}\right)$,$x \in R$ है। तो निम्नलिखित में से कौन सा सही है?

यदि $I_1 = \int\limits_0^1 {{e^{ - x}}} {\cos ^2}x\,dx$,$I_2 = \int\limits_0^1 {{e^{ - {x^2}}}} {\cos ^2}x\,dx$ और $I_3 = \int\limits_0^1 {{e^{ - {x^3}}}} dx$ है; तो

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

$\int_{\frac{\pi}{6}}^{\frac{\pi}{3}} \frac{1}{1+\tan^4 x} dx = $ . . . . . . .

$\int_{-\pi / 15}^{\pi / 15} \frac{\cos 5 x}{1+e^{5 x}} d x=$

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