sin²48°+sin²42°=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/25 10:07:44
sin²48°+sin²42°=?
sin²48°+sin²42°=?
sin²48°+sin²42°=?
=sin²48°+sin²42°
=sin²48°+cos²48°
=1
sin²48°+sin²42°=?
sin²48°+sin²42°=?
sin²48°+sin²42°=?
=sin²48°+sin²42°
=sin²48°+cos²48°
=1