4、已知两正弦电流i1=220sin314tA,i2=220sin (314t—120O)A,试写出
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已知正弦电流i1=70.7sin(347t-30°)A,i2=60sin(314t+60°)A.求正弦电流i1,i2的和已知正弦电流i1=70.7sin(314t-30°)A,i2=60sin(314
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