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Questions and answers by
Kassam henry/ jeremiah kwaghkondo
Answers (1)
Comparing the eqn with y=asin2pi(ft)-2piX/L. 2piFt=200pit, makin F the subject gives 200pit/2pit which gives F=100HZ. In finding lamda L, 2pix/L=20pix/15, cross multiply n make L the subject. L= 1.5 speed(v)=L*F, 1.5*100=150m/s
