Question: Show that y = ci cos x + c2 sin x is a two-parameter family of solutions for the differential equation y + y =

Show that y = ci cos x + c2 sin x is a two-parameter family of solutions for the differential equation y" + y = 0. Find a solution of the initial value problem consisting of this differential equation and the initial conditions y(0) = -1 and y (0) = 4

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