发布网友
共1个回答
热心网友
w<0
-π/2<x<π/2
πw/2<wx<-πw/2
(πw/2,-πw/2 ) 属于(-π/2,π/2)
-1<=w<0
热心网友
w<0
-π/2<x<π/2
πw/2<wx<-πw/2
(πw/2,-πw/2 ) 属于(-π/2,π/2)
-1<=w<0