# Chapter 6 - Differential Equations - 6.3 Exercises: 9

$y^{2}$=C-8cosx

#### Work Step by Step

yy'=4sinx $y\frac{dy}{dx}$+4sinx $\int$ydy+$\int$4sinxdx $\frac{y^{2}}{2}$=-4cosx+$C_{1}$ $y^{2}$=$C_1-8$cosx

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