sin²α+sin(90-α)=?-0-

来源：学生作业帮助网编辑：六六作业网时间：2024/10/05 14:08:23

sin²α+sin(90-α)=?-0-sin²α+sin(90-α)=?-0-sin²α+sin(90-α)=?-0-sin²α+sin²(90-α

sin²α+sin(90-α)=?-0-
sin²α+sin(90-α)=?
-0-

sin²α+sin(90-α)=?-0-
sin²α+sin²(90-α)= 后面加了一个平方
=sin²a+cos²a
=1