(2012•泉州模拟)命题p:∀x∈R,函数f(x)=2cos2x+3sin2x≤3,则( )
(2011•江苏模拟)函数y=3sin2x+cos2x,x∈R
(2013•惠州模拟)已知函数f(x)=2sin2x+2cos2x,x∈R.
(2013•黄梅县模拟)已知函数f(x)=3sin2x-cos2x,x∈R,给出以下说法:
(2010•东城区模拟)函数f(x)=sin2x−3cos2x
(2010•舟山模拟)已知函数f(x)=cos(2x−π3)+sin2x−cos2x.
(2013•惠州模拟)设函数f(x)=2cos2x+sin2x+a(a∈R).
(2012•南昌模拟)已知函数f(x)=3sin2x+23sinxcosx+5cos2x. &nb
已知函数f(x)=2cos2x+3sin2x+a(a∈R).
(2013•天津模拟)已知函数f(x)=sin2x+23sinxcosx+3cos2x,x∈R.求:
(2014•成都三模)已知函数f(x)=2cos2x+3sin2x,x∈R.
(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