यदि $\int \frac{\sin x \cos x}{\sqrt{\cos^4 x - \sin^4 x}} dx = -\frac{f(x)}{2} + c$ है,तो $f(x)$ का प्रांत (domain) क्या है?

  • A
    $[2n\pi, (2n+1)\pi], n=0, 1, 2, \ldots$
  • B
    $[(4n-1)\frac{\pi}{2}, (4n+1)\frac{\pi}{2}], n=0, 1, 2, \ldots$
  • C
    $[(4n-1)\frac{\pi}{4}, (4n+1)\frac{\pi}{4}], n=0, 1, 2, \ldots$
  • D
    $[(2n\pi - \frac{\pi}{4}), (2n\pi + \frac{\pi}{4})], n=0, 1, 2, \ldots$

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