作业帮sin²x+2sinx+cosx+3cos²x化简
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/14 08:13:39
x)+SS646++$TiϴlV_`gCZjl
!`I#tI iz1 (8ߠo /.H̳ "U
sin²x+2sinx+cosx+3cos²x化简
sin²x+2sinx+cosx+3cos²x化简
sin²x+2sinx+cosx+3cos²x化简
sin²x+2sinx*cosx+3cos²x
=1+2sinxcosx+2cos²x
=sin2x+cos2x+2
=√sin(2x+π/4)+2