June 2019 1 13 Report
Sebuah gelombang berjalan dinyatakan dengan persamaan simpangan y=2 sin (3Π/4t + Π/2)cm. Beda fase saat t = 1s dan t = 4s adalah...

a. 5/8
b. 7/8
c. 9/8
d. 9/2
e. 7/2

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