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yaro99
 one year ago
Having trouble with the particular solution:
y''+4y'+8y=2cos(2t)+sin(2t)
yaro99
 one year ago
Having trouble with the particular solution: y''+4y'+8y=2cos(2t)+sin(2t)

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Xavier
 one year ago
Best ResponseYou've already chosen the best response.0Guess Acos(2t)+Bsin(2t)

yaro99
 one year ago
Best ResponseYou've already chosen the best response.0I tried \[y_p=A \cos 2t+B \sin 2t\] and plugged in its derivatives, but I ended up with A=2/13 and B=3/13, but in the answer they are A=0 and B=1/4

yaro99
 one year ago
Best ResponseYou've already chosen the best response.0Oops I the 2 in 2t when differentiating. That's probably it, gonna try it now.

yaro99
 one year ago
Best ResponseYou've already chosen the best response.0I neglected* the 2 in 2t
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