What is the solution for y^{''}+25y=cos(2t) ?

The solution for y^{''}+25y=cos(2t) is y=c_{1}cos(5t)+c_{2}sin(5t)+1/21 cos(2t)

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y^{''}+25y=cos(2t)

y^{^{''}} + 25 y = cos (2 t)

y = c_{1} cos (5 t) + c_{2} sin (5 t) + \frac{1}{21} cos (2 t)

Solution steps

y^{''} (t) + 25 y = cos (2 t)

Solve linear ODE:

y = c_{1} cos (5 t) + c_{2} sin (5 t) + \frac{1}{21} cos (2 t)

y = c_{1} cos (5 t) + c_{2} sin (5 t) + \frac{1}{21} cos (2 t)

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What is the solution for y^{''}+25y=cos(2t) ?
The solution for y^{''}+25y=cos(2t) is y=c_{1}cos(5t)+c_{2}sin(5t)+1/21 cos(2t)