$\int \frac{\sin(2x)}{\sin^2(x) + 2\cos^2(x)} dx = $

  • A
    $\log |1 + \cos^2(x)| + c$
  • B
    $-\log |1 + \sin^2(x)| + c$
  • C
    $\log |1 + \tan^2(x)| + c$
  • D
    $-\log |1 + \cos^2(x)| + c$

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मान लीजिए $f(x) = \int \frac{x^2 dx}{(1 + x^2)(1 + \sqrt{1 + x^2})}$ और $f(0) = 0$ है,तो $f(1)$ का मान ज्ञात कीजिए।

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