The general solution of the differential equation \(\frac{{{d^2}y}}{{d{x^2}}} - \frac{{dy}}{{dx}} - 2y = 10\cos x\) is
1
y = c1e-x + c2e2x – 3cos x – sin x
2
y = c1ex + c2e2x – 3cos x
3
y = c1ex + c2e-2x – 3cos x – sin x
4
y = c1e-x + c2e-2x – 3x + sin x