【jetaineo】評論
100/4square(2)ㄥ45=25/square(2)ㄥ-451.VIcosㄥ45=100*25/square(2)*1/square(2)=12502.V^2/Z*cosㄥ45=1000/4square(2)*1/square(2)=12503.I^2*Z*cosㄥ45=(25/square(2))^2*4square(2)*1/square(2)=625/2*4=1250