$\int {\frac{{\sec x(1 + \tan x)dx}}{{({e^{ - x}} + \sec x)}}} = f(x) + C$ જ્યાં $f(0) = \ln 2$ હોય,તો $f\left( {\frac{\pi }{4}} \right)$ શું થાય?

  • A
    $\ln \left( {1 + {e^{\frac{\pi }{4}}}\sqrt 2 } \right)$
  • B
    $\ln \left( {\sqrt 2 } \right)$
  • C
    $\ln \left( {2\sqrt 2 } \right)$
  • D
    $\ln \left( {\frac{{{e^{\frac{\pi }{4}}}}}{{\sqrt 2 }} + 1} \right)$

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જો $\int \frac{2 \sin 2x - 3 \cos x}{2 \sin^2 x - 3 \sin x + 4} dx = f(x) + c$ જ્યાં $c$ એ સંકલનનો અચળાંક હોય, તો $f\left(\frac{\pi}{2}\right) - f(0) =$

$\int \frac{\sec^2 x}{(1 + \tan x)(2 + \tan x)} \, dx$ ની કિંમત શોધવા માટે,સૌથી યોગ્ય આદેશ (substitution) કયો છે?

$\int \frac{dx}{e^x+e^{-x}+2} = $

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