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Differential Equations 9 Online
OpenStudy (anonymous):

Steady state solution 4y''+12y'+9y=225-75sin(3t) I'm not sure what to do about the 225, I'd be able to solve it if it was just the sine term on the right.

OpenStudy (turingtest):

Just add another constant in your guess for the particular if you are using undefined variables.

OpenStudy (anonymous):

So it would be in the form \[K+a*\cos(3t)+b*\sin(3t)\]?

OpenStudy (turingtest):

right

OpenStudy (anonymous):

Cool, I got the solution. Thanks!

OpenStudy (turingtest):

welcome :D

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