若角α的终边经过(2,-1),则sinα=

来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/05 23:14:47
若角α的终边经过(2,-1),则sinα=若角α的终边经过(2,-1),则sinα= 若角α的终边经过(2,-1),则sinα=-√5/5

若角α的终边经过(2,-1),则sinα=
若角α的终边经过(2,-1),则sinα=
 

若角α的终边经过(2,-1),则sinα=
-√5/5