Given that the natural frequency of the system is n , which of the following is an appropriate form of the response for the system? A 1 , A 2 , A 3 , and A 4 are non-zero constants. Group of answer choices x ( t ) = A 1 c o s n t + A 2 s i n n t + A 3 c o s t + A 4 s i n t x ( t ) = A 1 c o s n t + A 2 s i n n t + A 3 c o s t x ( t ) = A 1 c o s n t + A 2 s i n n t + A 3 s i n t