-Thanks.

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/31 11:53:34

-Thanks.
-Thanks.
 

-Thanks.
选C
具体如图
画单位圆解决

THANKS thanks: Thanks thanks thanks Thanks! -Thanks. thanks thanks! thanks thanks! thanks thanks thanks thanks~ thanks thanks ,thanks!