Q Search n. Summer (2 Quew (1) sle alola usl) (4 Points) Ify,(1) = sin(4t)v, +...

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Q Search n. Summer (2 Quew (1) sle alola usl) (4 Points) Ify,(1) = sin(4t)v, + cos(4t)v2 isa particular solution of the, D.E. y" + 16y = sec(4t). Then vị by using the method of variation of parameters is In (sec 41) + In (sin 41) + 1 In (sin 41) + In (cos 41) + 1 (sin In (sin 4/nr)+ Q Search n. Summer (2 Quew (1) sle alola usl) (4 Points) Ify,(1) = sin(4t)v, + cos(4t)v2 isa particular solution of the, D.E. y" + 16y = sec(4t). Then vị by using the method of variation of parameters is In (sec 41) + In (sin 41) + 1 In (sin 41) + In (cos 41) + 1 (sin In (sin 4/nr)+