y= 4cos2x+4 sinxcosx-2=

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 14:39:41
y= 4cos2x+4 sinxcosx-2=
x)U0I/66Q(̫+tlmqِ,e 0IE4-fo ҩLŢ (Q JM,Ji!$فаY

y= 4cos2x+4 sinxcosx-2=
y= 4cos2x+4 sinxcosx-2=

y= 4cos2x+4 sinxcosx-2=
y= 4cos2x+4 sinxcosx-2
=4cos2x+2 sin2x-2
=2*(根号5)[(2根号5/5)cosx+(根号5/5)sinx]-2
=2*(根号5)sin(x+a)-2
a=arcsin(2*根号5/5)