Question

can you please give me a detailed walk through on how the solution for d2ydx2=−k2y is...

can you please give me a detailed walk through on how the solution for d2ydx2=−k2y is y(x)=C1cos(k x)+C2sin(k x). i really need help to understand this if you could write each step out and an explanition for each step

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if u feel any difficulty then comment it i will explain

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