यदि $\int \sqrt{2} \sqrt{1 + \sin x} \, dx = -4 \cos(ax + b) + c$ है,तो $(a, b)$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{2}, \frac{\pi}{4}$
  • B
    $1, \frac{\pi}{2}$
  • C
    $1, 1$
  • D
    इनमें से कोई नहीं

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यदि $f(\frac{x - 1}{x + 1}) = x + 1$ है, तो $\int f(x) dx = \dots$

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