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Basic Member
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這是我的算法
v1=2sin(ωt+90˚  =2cosωt
v2=1sinωt
v1+v2=2cosωt+sinωt=√5 [(2/√5)cosωt+(1/√5)sinωt]=√5 sin(θ+ωt)
√5=2.23
θ=63.43˚
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