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## Homework Statement

Determine the Laplace Transform of

∫(from 0 to t) (t-τ)cos(2(t-τ))e

^{-4τ}dτ

using Laplace Transform tables.

## Homework Equations

I know the basic convolution theorem is

(f*g)(t) = ∫f(τ)g(t-τ)dτ

## The Attempt at a Solution

I'm not sure if this is double convolution or if I'm missing an easy substitution.