已知正弦電流i1=70.7sin(314t-30°)A,i2=60sin(314t+60°)A.求正弦電流i1,i2的和

已知正弦電流i1=70.7sin(314t-30°)A,i2=60sin(314t+60°)A.求正弦電流i1,i2的和

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