What is inverse oflaplace (-2)/((s^2+1)^2) ?

The answer to inverse oflaplace (-2)/((s^2+1)^2) is -(sin(t)-tcos(t))

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inverse oflaplace (-2)/((s^2+1)^2)

inverse laplace

\frac{- 2}{( s ^{2} + 1 ) ^{2}}

- (sin (t) - t cos (t))

Solution steps

L^{- 1} {\frac{- 2}{( s ^{2} + 1 ) ^{2}}}

= L^{- 1} {- 1 \cdot \frac{2 \cdot 1 ^{3}}{( s ^{2} + 1 ^{2} ) ^{2}}}

Use the constant multiplication property of Inverse Laplace Transform:

For function

f (t)

and constant

a : L^{- 1} {a \cdot f (t)} = a \cdot L^{- 1} {f (t)}

= - 1 \cdot L^{- 1} {\frac{2 \cdot 1 ^{3}}{( s ^{2} + 1 ^{2} ) ^{2}}}

Use Inverse Laplace Transform table:

L^{- 1} {\frac{2 a ^{3}}{( s ^{2} + a ^{2} ) ^{2}}} = sin (a t) - a t cos (a t)

L^{- 1} {\frac{2 \cdot 1 ^{3}}{( s ^{2} + 1 ^{2} ) ^{2}}} = sin (t) - t cos (t)

= - 1 \cdot (sin (t) - t cos (t))

= - (sin (t) - t cos (t))

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What is inverse oflaplace (-2)/((s^2+1)^2) ?
The answer to inverse oflaplace (-2)/((s^2+1)^2) is -(sin(t)-tcos(t))