y=sin^2x-根号3sinxcosx-cos^2x化简

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y=sin^2x-根号3sinxcosx-cos^2x化简y=sin^2x-根号3sinxcosx-cos^2x化简y=sin^2x-根号3sinxcosx-cos^2x化简y=-(cos²

y=sin^2x-根号3sinxcosx-cos^2x化简
y=sin^2x-根号3sinxcosx-cos^2x化简

y=sin^2x-根号3sinxcosx-cos^2x化简
y=-(cos²x-sin²x)-√3sinxcosx=-cos2x-(√3/2)sin2x=-sin(2x+π/6)或者
y=-(cos²x-sin²x)-√3sinxcosx=-cos2x-(√3/2)sin2x=-cos(2x-π/3)