Ctri Alt Alt # 1 X" + 7. 84 x = 5 cos ( 8+) , x (0 ) = x101=0 XP = Acos ( 3 +) + BSin ( 3+) Xp' = - 3 Asin ( 3+) + 36 cos. (3+) Xp" =_ 9 asin ( 3+) + 9 bcos ( 3+) Sub into ade Xp" + Xp't Xp = cos (+) - gasin ( 3+) + absin ( st) + 5 ( - 3 asin(at ) + 3 bsin ( 3+ ) + Accs ( st ) + BSin ( 3+ ) = S Cos ( 3+) +0 Sin (3+)Section 3.8 Forced Mechanical Vibration: Problem 2 (1 point) Previous Problem Problem List Next Problem This is an example of an Undamped Forced Oscillation where the phenomenon of Pure Resonance Occurs. Find the solution of the initial value problem: ac" + 36: = 24 sin(6t), =(0) = ='(0) = 0 I (t )= Graph the solution to confirm the phenomenon of Pure Resonance