find the general solution of the given differential equation u''+ u=cos t I assumed U to be Acoswt+Bsinwt but it didn't work out. Thanks in advance.
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Originally Posted by elmo find the general solution of the given differential equation u''+ u=cos t I assumed U to be Acoswt+Bsinwt but it didn't work out. Thanks in advance. What you found is the solution to . You have to add to this a particular solution of .
solved, thanks.
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