(2010•眉山二模)已知函数f(x)=cos2x,g(x)=1+12sin2x.
(2013•怀化二模)已知函数f(x)=32sin2x−12(cos2x−sin2x)−1
(2011•昌平区二模)已知函数f(x)=3sin2x+2cos2x.
(2014•东莞二模)已知函数f(x)=2sin2x+2cos2x,x∈R.
已知函数f(x)=sin2x+cos2x+12cosx.
(2013•潮州二模)已知函数f(x)=3(sin2x−cos2x)−2sinxcosx.
(2009•台州二模)已知函数f(x)=sin2x+23sinxcosx+3cos2x.
(2008•杭州二模)设函数f(x)=12x−18sin2x−38cos2x.
(2010•江门一模)已知函数f(x)=sin2x−cos2x+12sinx.
(2007•东城区一模)已知函数f(x)=12cos2x−sinxcosx−12sin2x.
(2011•淮南一模)已知函数f(x)=cos2x−sin2x+23sinxcosx+1.
(2010•舟山模拟)已知函数f(x)=cos(2x−π3)+sin2x−cos2x.
(2011•重庆三模)已知a=(sin2x−cos2x),b=(sin2x,3sin2x),若函数f(x)=a•b.