问题
填空题
函数y=sin(-x+
|
答案
∵y=sin(-x+
)π 3
=-sin(x-
),(x∈[0,2π])π 3
∴函数y=sin(-x+
)(x∈[0,2π])的单调减区间为y=sin(x-π 3
)的单调增区间.π 3
∴由2kπ-
≤x-π 2
≤2kπ+π 3
(k∈Z)得:π 2
2kπ-
≤x≤2kπ+π 6
,k∈Z,5π 6
又x∈[0,2π],
∴0≤x≤
或5π 6
≤x≤2π.11π 6
故答案为:[0,
],[5π 6
,2π].11π 6