The given differential equation is not exact, if we convert it to an exact one, we get:
[tex]2ydx + 2*(x - sin(y)^{1/2})*dy = 0[/tex]
A differential equation:
[tex]Ndx + Mdy = C[/tex]
Is exact only if:
[tex]\frac{dM}{dy} = \frac{dN}{dx}[/tex]
In this case, we have:
[tex]2ydx + (x - sin(y)^{1/2})*dy = 0\\\\then:\\\\N = 2y\\M = x - sin(y)^{1/2}[/tex]
If we differentiate, we will get:
[tex]\frac{dN}{dy} = 2\\\\\frac{dM}{dx} = 1[/tex]
So, to convert this to an exact differential equation, we need to add a factor 2 to N, this will give:
[tex]2ydx + 2*(x - sin(y)^{1/2})*dy = 0[/tex]
This is, in fact, an exact differential equation.
If you want to learn more about differential equations:
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