【简答题】第二象限角的集合应表示为( ). 下列各角中哪些是终边相同的角? -75°,105°,285°,-315°,405°,-615° 已知-540°<α<-180°,且α与45°角终边相同,求角α.
【单选题】Why will the woman see the man again tomorrow?
A.
To pick up some documents about study-abroad programs.
B.
To set up a meeting with a language department professor.
C.
To discuss the requirements for students studying abroad.
D.
To plan her travel itinerary for her trip to Spain.
【单选题】下列各角中与45°角终边相同的角是( )
【简答题】在 0° ~ 360° 范围内,与下列 405° 角终边相同的角是 ,它 是第 象限的角 .
【简答题】Are you ____ about how to study and make your study more effective(有效率的)? We all know that some students usually study very hard for a long ___. This is very good, but it doesn’t ___a lot, for an effe...
【单选题】与 405° 角终 边相同 的角 的集合 可表示为 ( )
A.
{α|α=225 ° + k˙ 360 ° , k ∈ Z }
B.
{α|α=135 ° + k˙ 360 ° , k ∈ Z }
C.
{α|α=45 ° + k˙ 360 ° , k ∈ Z }
D.
{α|α=-45 ° + k˙ 360 ° , k ∈ Z }