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    Solve a 2nd order ODE.

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    y'' + 9y = -18sin(3t)

    © BrainMass Inc. brainmass.com September 26, 2022, 9:32 am ad1c9bdddf

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    Because this is a linear ODE with constant coeffs, then we can guess yp as follow:

    yp= Acos(3t)+ Bsin(3t)

    However, if we look ...

    Solution Summary

    A 2nd order ODE is solved. The solution is detailed.