diff-equation

Question: The differential equation whose solution is $y=A\sin x+B\cos x,$ is



1) $\frac{{{d}^{2}}y}{d{{x}^{2}}}+y=0$
2) $\frac{{{d}^{2}}y}{d{{x}^{2}}}-y=0$
3) $\frac{dy}{dx}+y=0$
4) None of these
Solution: Explanation: No Explanation
Formation of differential equations

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