$\int \frac{\cos 2x + x + 1}{x^2 + \sin 2x + 2x} \, dx = $

  • A
    $\log (x^2 + \sin 2x + 2x) + c$
  • B
    $-\log (x^2 + \sin 2x + 2x) + c$
  • C
    $\frac{1}{2}\log (x^2 + \sin 2x + 2x) + c$
  • D
    इनमें से कोई नहीं

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यदि $I = \int \frac{\sin^2 x - 1}{2x \sin^2 x + \sin 2x} dx$ है,तो. . . . . $( \sin x \neq 0)$ (जहाँ $c$ समाकलन का एक स्थिरांक है)

$\int \cos x \sqrt{4 - \sin^2 x} \; dx = $

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