A.0.287 B.0.281 C.0.291 D.0.331
A.0.1 B.0.15 C.0.2 D.0.25
A.P=3UI(–1/2cosφ+√3/2sinφ) B.P=0 C.P=1 D.P=√3UI(–1/2cosφ+√3/2sinφ)