$0 < x < \frac{\pi}{2}$ के लिए समाकलन $\int \sqrt{1 + 2\cot x(\csc x + \cot x)} \,dx$ का मान ज्ञात कीजिए (जहाँ $C$ एक समाकलन स्थिरांक है):

  • A
    $2\log \left| \sin \frac{x}{2} \right| + C$
  • B
    $4\log \left| \sin \frac{x}{2} \right| + C$
  • C
    $2\log \left| \cos \frac{x}{2} \right| + C$
  • D
    $4\log \left| \cos \frac{x}{2} \right| + C$

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$f^{\prime}(x) = 3 \sin x - 4 \sin^3 x$ और $f(0) = \frac{1}{3}$ है,तो $c$ का मान ज्ञात कीजिए,जहाँ $c$ समाकलन स्थिरांक है।

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