化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
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化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)化简y=sin^2(x)+2sin(x)cos(x)+3
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
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化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
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