4sin^2x(sin^2x-1)+1+sin^2(2x)+(cosx/sinx)*(sin2x/cos2x)*(-cos2x/cos^2x)=
=1-sin2x/sinxcosx=1-1/2=1/2
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4sin^2x(sin^2x-1)+1+sin^2(2x)+(cosx/sinx)*(sin2x/cos2x)*(-cos2x/cos^2x)=
=1-sin2x/sinxcosx=1-1/2=1/2