终边在第一、四象限的角的集合可分别表示 ______
终边在第一、四象限的角的集合可分别表示 ______．
推荐回答（3个）
第一象限角的集合为{α|2kπ＜α＜2kπ+，k∈z，}，
第四象限角的集合为{α|2kπ-＜α＜2kπ，k∈z，}，
∴终边在第一、四象限的角的集合可分别表示 {α|2kπ＜α＜2kπ+，k∈z，}、{α|2kπ-＜α＜2kπ，k∈z，}．
第一象限角满足,,第四象限角满足,.
解:第一象限角的集合为,第四象限角的集合为,终边在第一,四象限的角的集合可分别表示,.
本题考查象限角,轴线角的概念,象限角的表示方式,第四象限角满足,,也可以说第四象限角满足,,
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