Question
Equation 2.39 is derived but missing steps. Please show all the steps. And show how you get the response for resonance case

x(t)Bit cos wnt+B2t sinwnt,

cos wntBtu2B2wn + wB,t sin wtB2-2B1W, +w2B2t coswnt m

a()2 sinwnt, (2.39) km

x(t)Bit cos wnt+B2t sinwnt,
cos wntBtu2B2wn + wB,t sin wtB2-2B1W, +w2B2t coswnt m
a()2 sinwnt, (2.39) km
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Answer #1

J 2 Cos n t tg -コ 2 2 Cas in wnt A m fo7 (4M ナ01n Comparing sdes loef cient of Coswn t get and hwnt / A and 2 and 2 m Wh Wn

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