Without using the shift formula prove that Laplace of f (t) = e**-atcos wt is w**2/((s+a)**2+w**2)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 78E
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Without using the shift formula prove that Laplace of

f (t) = e**-atcos wt is w**2/((s+a)**2+w**2)

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