f(x)=sin2²x+2sinxcosx-cos²x
=2sinxcosx-(cos²x-sin2²x)
=sin(2x)-cos(2x)
=√2sin(2x-π/4)
已知函数f(x)=sin2x+2sinxcosx-cos2x ()
已知函数f(x)=sin2x+2sinxcosx-cos2x ()
数学人气:823 ℃时间:2019-09-23 14:52:48
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