单项选择题
A. B. C.
A.5sin(ωt+53.1°)A B.5√2sin(ωt+36.9°)A C.5√2sin(ωt+53.1°)A
A.i=5sin(100πt-60°)A B.i=7.07sin(100πt+30°)A C.i=10sin(200πt-60°)A