$\int e^x \left( \frac{1+\sin x}{1+\cos x} \right) dx =$

  • A
    $e^x \tan \frac{x}{2} + c$
  • B
    $e^x \cot \frac{x}{2} + c$
  • C
    $e^x \cos \frac{x}{2} + c$
  • D
    $e^x \sin \frac{x}{2} + c$

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$\int e^{x}\left(\frac{1-x}{1+x^{2}}\right)^{2} \,d x=$

$\int \frac{3^x(x \log 3-1)}{x^2} d x=$

$\int \frac{e^{\tan ^{-1} x}}{1+x^2}\left[\left(\sec ^{-1} \sqrt{1+x^2}\right)^2+\cos ^{-1}\left(\frac{1-x^2}{1+x^2}\right)\right] d x=$

मान लीजिए $f(x) = \int \frac{(2-x^2)e^x}{(\sqrt{1+x})(1-x)^{3/2}} dx$ है। यदि $f(0) = 0$ है, तो $f(\frac{1}{2})$ का मान ज्ञात कीजिए:

$\int e^x \left( \frac{1 + \sin x}{1 + \cos x} \right) dx = $ . . . . . . $+ c$.

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