Higher Order Differential Equation: (D^3 + 1) y = cos^2(x/2) + e^{-x}

[storm0042]

(D³+1)y= cos²(x/2) + e^-x

I have calculated complementary function help me finding out in particular integral

 

[Deleted member 4993]

(D³+1)y= cos²(x/2) + e^-x

I have calculated complementary function help me finding out in particular integral

Hint: cos²(x/2) = (1/2)*cos(x) + (1/2)