Question

Please help me find the Laplace transform of f(t)=sin(5t)cos(4t)

Answer 1

Try rewriting as \(\sin(5t)\cos(4t)=\dfrac{\sin t+\sin(9t)}{2}\). If you know the transform for \(\sin(at)\), you're as good as done.

Answer 2

Ok I'll try that

Answer 3

Thanks