2
Объяснение:
1-2sinxcosx=(sinx-cosx)^2=(sin(-П/4)-cosП/4)^2=
=(-sin(п/4)-cosП/4)^2=(-√2/2-√2/2)^2=(-√2)^2=2
1-2sinxcosx=1-sin2x=1-sin(2*(-П/4))=1-sin(-п/2)=1-(-1)=2
2
Объяснение:
1-2sinxcosx=(sinx-cosx)^2=(sin(-П/4)-cosП/4)^2=
=(-sin(п/4)-cosП/4)^2=(-√2/2-√2/2)^2=(-√2)^2=2
1-2sinxcosx=1-sin2x=1-sin(2*(-П/4))=1-sin(-п/2)=1-(-1)=2