$\int \frac{dx}{2+\cos x} = $ (જ્યાં $C$ એ સંકલનનો અચળાંક છે.)

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

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Difficult
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જો $\int {({x^3} - 2{x^2} + 5){e^{3x}}\,dx} = e^{3x} (Ax^3 + Bx^2 + Cx + D) + K$ હોય,તો કયું વિધાન ખોટું છે?

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