यदि $\int \frac{\cos 4x + 1}{\cot x - \tan x} dx = k \cos 4x + c$ है,तो $k$ का मान ज्ञात कीजिए।

  • A
    $\frac{-1}{2}$
  • B
    $\frac{-1}{8}$
  • C
    $\frac{-1}{3}$
  • D
    $\frac{-1}{5}$

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$\int \sec x \tan^3 x \, dx = $

यदि $\int \frac{\sin ^{\frac{3}{2}} x+\cos ^{\frac{3}{2}} x}{\sqrt{\sin ^3 x \cos ^3 x \sin (x-\theta)}} d x=A \sqrt{\cos \theta \tan x-\sin \theta}+B \sqrt{\cos \theta-\cot x \sin \theta}+C,$ जहाँ $C$ समाकलन स्थिरांक है,तो $AB$ का मान ज्ञात कीजिए।

यदि $k \in (1, \infty)$ है, तो $\int \frac{1}{1+k \cos x} d x=$

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