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Question: Answered & Verified by Expert
The solution of the equation $\left(1+x^2\right) \frac{d y}{d x}=1$ is
MathematicsDifferential EquationsJEE Main
Options:
  • A $y=\log \left(1+x^2\right)+c$
  • B $y+\log \left(1+x^2\right)+c=0$
  • C $y-\log (1+x)=c$
  • D $y=\tan ^{-1} x+c$
Solution:
2328 Upvotes Verified Answer
The correct answer is: $y=\tan ^{-1} x+c$
$\left(1+x^2\right) \frac{d y}{d x}=1 \Rightarrow \frac{d y}{d x}=\frac{1}{1+x^2}$
On integrating, $y=\tan ^{-1} x+c$

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