MCQ
Solution of differential equation $\left( {1 + {e^{2y}}} \right){e^{{{\tan }^{ - 1}}x}}dx - \left( {1 + {x^2}} \right)\left( {{e^y} + {{\left( {{e^y} - 1} \right)}^2}} \right)dy = 0$ is
  • A
    $\ln \left( y \right) = \tan \left( {y - {e^{{{\tan }^{ - 1}}x}} + C} \right)$
  • $y = \ln \left( {\tan \left( {y - {e^{{{\tan }^{ - 1}}x}} + C} \right)} \right)$
  • C
    $\ln \left( y \right) = \tan \left( {{e^{{{\tan }^{ - 1}}x}} - y + C} \right)$
  • D
    $y = \ln \left( {\tan \left( {{e^{{{\tan }^{ - 1}}x}} - y + C} \right)} \right)$

Answer

Correct option: B.
$y = \ln \left( {\tan \left( {y - {e^{{{\tan }^{ - 1}}x}} + C} \right)} \right)$
b
$\frac{e^{t x}-1^{-1} x}{1+x^{2}} d x-\frac{e^{2 y}-e^{y}+1}{e^{2 y}+1} d y=0$

$e^{\tan ^{-1} x}-y+\tan ^{-1}\left(e^{y}\right)=C$

$e^{y}=\ln \left(\tan \left(y-e^{\tan ^{-1} x}+C\right)\right)$

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