यदि $f(x) = \int_0^{\pi/2} \frac{\ln(1 + x \sin^2 \theta)}{\sin^2 \theta} d\theta$,$x \geq 0$ है,तो:

  • A
    $f(x) = \pi(\sqrt{x+1} - 1)$
  • B
    $f'(x) = \frac{\pi}{2\sqrt{x+1}}$
  • C
    $f(x)$ निर्धारित नहीं किया जा सकता
  • D
    $(A)$ और $(B)$ दोनों

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