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Find a synchronous solution of the form A cos (21+ B sin 2t to the given forced oscillator equation using the method of insertion,

Find a synchronous solution of the form A cos (21+ B sin 2t to the given forced oscillator equation using the method of insertion, collecting terms, and matching coefficients to solve for A and B. y"+2y+3y 3 sin 21, 02-2 A solution is y(t) =

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