Solution of $\frac{d y}{d x}=\frac{x \log x^2+x}{\sin y+y \cos y}$ is

Solution of $\frac{d y}{d x}=\frac{x \log x^2+x}{\sin y+y \cos y}$ is
  1. $y \sin y=x^2 \log x+C$
  2. $y \sin y=x^2+C$
  3. $y \sin y=x^2+\log x$
  4. $y \sin y=x \log x+C$

Solution

We have, $\frac{d y}{d x}=\frac{x \log x^2+x}{\sin y+y \cos y}$ $\Rightarrow(\sin y+y \cos y) d y=\left(x \log x^2+x\right) d x$ On integrating both sides, we get $-\cos y+y \sin y+\cos y$ $=\frac{x^2}{2} \log x^2-\frac{x^2}{2}+\frac{x^2}{2}+C$ $\Rightarrow \quad y \sin y=\frac{x^2}{2} \log x^2+C$ $\therefore \quad y \sin y=x^2 \log x+C$

Asked in: MHT CET Full Test 9

Practice more Differential Equations questions on Aicharya