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4. Given L {sinh (-4t)} = -(4/ (s2 -16)), find L{ t sinh (-4t) } 5....

4. Given L {sinh (-4t)} = -(4/ (s2 -16)), find L{ t sinh (-4t) }

5. Given y''(t) + 3y(t) = e-2t cos t and y(0) = -1, y'(0), find L { y(t) }

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