( )已知正弦量的瞬时值表达式u1=20sin (314t+π/6) V,u2=40sin(314t-π/3),其矢量图为

( )已知正弦量的瞬时值表达式u1=20sin (314t+π/6) V,u2=40sin(314t-π/3),其矢量图为:

A.正确

B.错误

正确答案是A