The Laplace transform of eat cos (αt) is equal to—

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The Laplace transform of eat cos (αt) is equal to—

1. (s – α)
  (s – α)² + α²
2. (s + α)
  (s + α)² + α²
3. 4
  (s – α)²
4. None of these

Correct Option: A

Explanation can seen in synopsis on signals and systems.