- #1
tolove
- 164
- 1
y(4) - y = 3t + cos t
y''' - y' = 2sint
y(4) + 2y'' + y = 3 + cos 2t
For problems like these, how do you determine what to make Y(t) for the trigonometric part?
Sometimes its At cos t, A cos t, A sin t, and I think occassionally even A0sin t + Acos t
Am I simply supposed to guess until I get the right answer? That's what I'm doing, and it's working, but it feels wrong and is very time consuming.
Thanks!
y''' - y' = 2sint
y(4) + 2y'' + y = 3 + cos 2t
For problems like these, how do you determine what to make Y(t) for the trigonometric part?
Sometimes its At cos t, A cos t, A sin t, and I think occassionally even A0sin t + Acos t
Am I simply supposed to guess until I get the right answer? That's what I'm doing, and it's working, but it feels wrong and is very time consuming.
Thanks!