1.

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

A. 2a<sup>3</sup> ‚ÅÑ (s<sup>2</sup> + a<sup>2</sup>)
B. s+a ‚ÅÑ s-a
C. Indeterminate
D. s-a ⁄ (s – a)<sup>2</sup> + b<sup>2</sup>
Answer» E.


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