यदि $\int {\frac{{{e^x}(1 + \sin x)}}{{1 + \cos x}}} dx = {e^x}f(x) + c$ है,तो $f(x) = $

  • A
    $\sin \frac{x}{2}$
  • B
    $\cos \frac{x}{2}$
  • C
    $\tan \frac{x}{2}$
  • D
    $\log \frac{x}{2}$

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यदि $x \in [-1, 1]$ है,तो $\int e^{\sin^{-1} x} \left( \frac{x + \sqrt{1-x^2}}{\sqrt{1-x^2}} \right) dx$ का मान क्या है?

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$\int \frac{x e^x}{(1 + x)^2} dx = $

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