The inverse LaPlace of
I have no idea how to solve the problem with the inverse laplace transforms.
*Find the Inverse laplace transform of { 3/ (s + 4) }
I guessed that the answer, f(t) would be: 3 cos 2t
However it doesn't make sense because according to the table, -cos kt- is equal to F(s)=> s / (s^(2) + k^(2)).
In this case, s is not squared. I am not sure about k because I think it's not squared. If it is squared then k is equal to 2. That's how I got
3 cos 2t.
however if k is not squared then k is equal to 4. I am confused...
Please help