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OpenStudy (anonymous):
in pauls notes on 2nd order differential equation here: http://tutorial.math.lamar.edu/Classes/DE/ComplexRoots.aspx why are we trying to find the second solution to the differential equation? why is the cosine solution not good enough? why is subtracting y1(t) an y2(t) a method of finding that second solution?
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OpenStudy (anonymous):
Oh, I see it, nevermind.
OpenStudy (anonymous):
i want to know why 2i e^lambda*t (sin (u*t)) is a required solution
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