General solution is

y = e ^(-2x) ( C cos 2x + D sin 2x) - ( cos2x - sin2x)

y complentary = e ^(-2x) ( C cos 2x + D sin 2x)

y particular = - cos2x - sin2x

thanks

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- February 11th 2010, 12:50 PMacu04385Differentiate gen. solution of a inhomogeneous diff equation to find particular soln!
General solution is

y = e ^(-2x) ( C cos 2x + D sin 2x) - ( cos2x - sin2x)

y complentary = e ^(-2x) ( C cos 2x + D sin 2x)

y particular = - cos2x - sin2x

thanks - February 13th 2010, 09:25 AMGrandad