y=4根号2sinxcosx+cos2x
=2根号2sin2x+cos2x
=3(2根号2/3*sin2x+1/3*cos2x)
=3sin(2x+m)
式中sinm=1/3
0
x属于0到π\2的闭区间,求y=4根号2sinxcosx+cos2x的值域
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