Which of the following is the valid differential equation x = a cos(α – McqOptions

MCQOPTIONS

1.	Which of the following is the valid differential equation x = a cos(αt + β)?
A.	d2x/dt2 – αx = 0
B.	d2x/dt2 + αx = 0
C.	d2x/dt2 – α2x = 0
D.	d2x/dt2 + α2x = 0
Answer» E.

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