0st<"/2 – "/2) tz"/2 Solve using Laplace transforms. y" –- 3y' - y = } y(0) = y'(0) = 0 cos(t SHOW WORK

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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**Problem:**

Solve the differential equation using Laplace transforms.

\[
y'' - 3y' - y = 
\begin{cases} 
0 & 0 \leq t < \pi/2 \\
\cos(t - \pi/2) & t \geq \pi/2 
\end{cases}
\]

with initial conditions \( y(0) = 0 \) and \( y'(0) = 0 \).

**Instructions:**

- Show all the steps of your work to solve the problem using Laplace Transform techniques.
  
- Clearly explain any properties or theorems of Laplace Transforms used in solving the problem.

**Solution Strategy:**

1. **Formulate the problem using the Laplace transform**: Take the Laplace transform of both sides of the differential equation.

2. **Apply initial conditions**: Use the given initial conditions in the transformed equation.

3. **Solve for the Laplace transform of \( y(t) \)**: Rearrange the equation to isolate the transform.

4. **Inverse Laplace transform**: Apply the inverse Laplace transform to find \( y(t) \).

5. **Piecewise function handling**: Address the piecewise function using unit step functions.

6. **Verify the solution**: Ensure the solution satisfies the differential equation and initial conditions. 

Provide details and justifications for each of these steps where applicable.
Transcribed Image Text:**Problem:** Solve the differential equation using Laplace transforms. \[ y'' - 3y' - y = \begin{cases} 0 & 0 \leq t < \pi/2 \\ \cos(t - \pi/2) & t \geq \pi/2 \end{cases} \] with initial conditions \( y(0) = 0 \) and \( y'(0) = 0 \). **Instructions:** - Show all the steps of your work to solve the problem using Laplace Transform techniques. - Clearly explain any properties or theorems of Laplace Transforms used in solving the problem. **Solution Strategy:** 1. **Formulate the problem using the Laplace transform**: Take the Laplace transform of both sides of the differential equation. 2. **Apply initial conditions**: Use the given initial conditions in the transformed equation. 3. **Solve for the Laplace transform of \( y(t) \)**: Rearrange the equation to isolate the transform. 4. **Inverse Laplace transform**: Apply the inverse Laplace transform to find \( y(t) \). 5. **Piecewise function handling**: Address the piecewise function using unit step functions. 6. **Verify the solution**: Ensure the solution satisfies the differential equation and initial conditions. Provide details and justifications for each of these steps where applicable.
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