$\int \frac{dx}{5 + 4\cos x} = $

  • A
    $\frac{2}{3}\tan^{-1}\left( \frac{1}{3}\tan x \right) + c$
  • B
    $\frac{1}{3}\tan^{-1}\left( \frac{1}{3}\tan x \right) + c$
  • C
    $\frac{2}{3}\tan^{-1}\left( \frac{1}{3}\tan \frac{x}{2} \right) + c$
  • D
    $\frac{1}{3}\tan^{-1}\left( \frac{1}{3}\tan \frac{x}{2} \right) + c$

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જો $\int \frac{\sin ^3 x}{\left(\cos ^4 x+3 \cos ^2 x+1\right) \tan ^{-1}(\sec x+\cos x)} d x=f(x)+C$ હોય,તો $e^{f(x)}=$

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