Solve the given equation by the method of undetermined coefficients. y +9y = 5 cos 4x Choose the correct solution below. c, and c, are
Solve the given equation by the method of undetermined coefficients. y" +9y = 5 cos 4x Choose the correct solution below. c, and c, are arbitrary constants. O A. y=c, cos 3x + C, sin 3x + 5 cos 4x O B. y=c, cos 3x + C, sin 3x + 5 sin 4x O C. y=, cos 3x + c, sin 3x - COS 4X OD. y=c, cos 3x + c, sin 3x - sin 4x
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