નીચેનામાંથી કયું સાચું છે?

  • A
    $\int_{a}^{\pi - a} x f(\sin x) dx = \frac{\pi}{2} \int_{a}^{\pi - a} f(\sin x) dx$
  • B
    $\int_{-a}^{a} f(x)^2 dx = 2 \int_{0}^{a} f(x)^2 dx$
  • C
    $\int_{0}^{n\pi} f(\cos^2 x) dx = n \int_{0}^{\pi} f(\cos^2 x) dx$
  • D
    ઉપરના તમામ

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$\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \log \left(\frac{2-\sin \theta}{2+\sin \theta}\right) d \theta$ ની કિંમત શોધો.

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ધારો કે $I=\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}} \frac{1}{2-\cos 2 x}\left(\frac{3}{\pi}+\log \left(\frac{4+\sin x}{4-\sin x}\right)\right) d x$. આપેલ છે કે $\int \frac{d x}{1+k x^2}=\frac{1}{\sqrt{k}} \tan ^{-1}(\sqrt{k} x)+c, \tan ^{-1}(0)=0$ અને $\tan ^{-1}(\sqrt{3})=\frac{\pi}{3}$. તો $3 I^2=$

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