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Fungsi gelombang : y = A sin (w.t + k.x)
Maka,
Amplitudo (A) = 3 (meter).
45 derajat = 1/4 π radian.
Diketahui rumus:
w = 2π/T
dimana w = kecepatan sudut
Maka,
Periode (T) = 2π/w = 2π/(1/4)π = 8 (sekon).