Find the general solution of the differential equation
+ 3y = cos x.
A) y =
sin (
x) +
cos (
x) -
cos x
B) 
C) y =
sin (3x) +
cos (3x) + sin x
D) y =
sin (3x) +
cos (3x) - sin x
E) y =
sin (
x) +
cos (
x) -
sin x
Correct Answer:
Verified
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