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问答题
As the circuit shown in the figure, the voltage source us(t)=3cos4t V. Solve the current i=[填空1]mA，when t=1s.
As the circuit shown in the figure, the voltage source us(t)=3cos4t V. Solve the current i=[填空1]mA，when t=1s.
答案：
1、-0.65
