含all 3 %).. 2_52491685880... The solution to the initial value problem, y" +4y + 5y = cos cos 9x, y (0) = 0 is y (x) = ? y= (e, cos cas x + sin atu x)+ sin ain r - cos cos 9r y-oi( cos cas+e sin t x)-...

Extracted text: 含all 3 %).. 2_52491685880... The solution to the initial value problem, y" +4y + 5y = cos cos 9x, y (0) = 0 is y (x) = ? y= (e, cos cas x + sin atu x)+ sin ain r - cos cos 9r y-oi( cos cas+e sin t x)- sin sy 9t cos cos 9r y-( cos cos x + sin nie x) - sin sôn S - cos cos 9 -( coscor+ sin sin x)+, sin the 9r - cos cos 9n