$\int_{0}^{\frac{\pi}{2}} \log \left[\sqrt{\frac{1-\cos 2x}{1+\cos 2x}}\right] dx =$

  • A
    $1$
  • B
    $\frac{\pi}{4}$
  • C
    $0$
  • D
    $\frac{\pi}{8}$

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$\int\limits_{\frac{-\pi}{2}}^{\frac{\pi}{2}} \frac{x^2}{1 + \tan x + \sqrt{1 + \tan^2 x}} \, dx$ નું મૂલ્ય શોધો.

જો $b = \int_{0}^{1} \frac{e^{t}}{t+1} dt$ હોય,તો $\int_{a-1}^{a} \frac{e^{-t}}{t-a-1} dt$ ની કિંમત શોધો.

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