2sin^x+1>cos2x+2如何→cos2x
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2sin^x+1>cos2x+2如何→cos2x
2sin^x+1>cos2x+2如何→cos2x
2sin^x+1>cos2x+2如何→cos2x
2sin^x+1>cos2x+2
2sin^x-1+2>cos2x+2
-cos2x+2>cos2x+2
-2cos2x>0
cos2x
2sin^x+1=1+(1-cos2x)>cos2x+2
2-cos2x>cos2x+2
2cos2x<0
cos2x<0
2sin^x+1>cos2x+2如何→cos2x
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