(2014•浙江模拟)已知函数f(x)=sin2x+23
(2014•浙江模拟)已知函数f(x)=sin2x+23
(2014•荆州模拟)已知函数f(x)=sin2x+2sin2x1+tanx−23cos2x+3.
(2014•荆州模拟)已知函数f(x)=sin2x+2sin2x1+tanx−23cos2x+3
(2014•赤峰模拟)已知函数f(x)=23sinxcosx-2sin2x+1.
(2014•赤峰模拟)已知函数f(x)=23sinxcosx+2sin2x-1.
(2013•天津模拟)已知函数f(x)=32sin2x−12(cos2x−sin2x)−1
(2014•北京模拟)已知函数f(x)=sin2x+3sinxcosx−12.
(2011•阜阳模拟)已知函数f(x)=sin2x+cos2x.
(2010•南昌模拟)已知函数f(x)=3sinxcosx+sin2x.
(2013•浙江模拟)已知函数f(x)=23sinxcosx+2cos2x-t.
已知函数f(x)=sin2x-2sin2x
(2013•黄梅县模拟)已知函数f(x)=3sin2x-cos2x,x∈R,给出以下说法: