Posted by jimmy on Wednesday, October 27, 2010 at 4:01am.
the Laplace transform of e^4t(cos 2t)??
please i need help. thanks

college math  jai, Wednesday, October 27, 2010 at 4:05am
first, there is sshifting here since e^4t is multiplied to cos(2t).
from e^4t, we know that a = 4,, and that L{cos 2t} = s/(s^2 + 4) , therefore:
L{e^4t(cos 2t)} = (sa)/((sa)^2 + 4) = (s4)/((s4)^2 + 4)
so there,, :)

college math  Anonymous, Wednesday, October 27, 2010 at 2:45pm
(3m − 2n)(3m + 4n)
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