If f(t) = eat cos(bt), then its Laplace transform is?

1.	If f(t) = e^at cos(bt), then its Laplace transform is?
A.	2a<sup>3</sup> (s<sup>2</sup> + a<sup>2</sup>)
B.	s+a s-a
C.	Indeterminate
D.	s-a (s a)<sup>2</sup> + b<sup>2</sup>
Answer» E.

Discussion