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T = 3s
t = 2s
dit y
y = A sin Ф
y = A sin ωt
y = A sin 2πt/T
y = 8 sin 2π2/3
y = 8 sin 4/3π ---> 4/3π=120--->sin120 = 1/2√3
y = 8 sin 120"
y = 8.1/2√3 = 4√3
y = 4√3 cm