2cos^2-1=cos2x
cos^2=(1+cos2x)/2
f(x)=sinxcosx-(根号3)cos^2+(根号3)/2
=sin2x/2-根号3*(cos2x+1)/2
=sin2x/2-根号3*/2*cos2x
=sin2xsin30-cos2xcos30
=-cos(2x+30)
=cos(2x-150)
1,最小正周期π
图像对称中心座标x=5π/12
2 当0<=x<=π/2时
fx值域[-√3/2,1]
已知函数f(x)=sinxcosx-(根号3)cos^2+(根号3)/2
已知函数f(x)=sinxcosx-(根号3)cos^2+(根号3)/2
1,求最小正周期和图像对称中心座标.2 当0<=x<=π/2时 fx值域
1,求最小正周期和图像对称中心座标.2 当0<=x<=π/2时 fx值域
数学人气:714 ℃时间:2019-10-20 18:05:02
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