(2011•江苏模拟)函数y=3sin2x+cos2x,x∈R
(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
(2013•惠州模拟)设函数f(x)=2cos2x+sin2x+a(a∈R).
(2013•天津模拟)已知函数f(x)=sin2x+23sinxcosx+3cos2x,x∈R.求:
(2014•潍坊模拟)已知函数f(x)=32sin2x−12(cos2x−sin2x)−1,x∈R,将函数f(x)向左平
(2014•潍坊模拟)若函数y=cos2x+3sin2x+a
已知函数y=sin2x+2sinxcosx+3cos2x,x∈R.
已知函数y=sin2x+2sinxcosx+3cos2x,x∈R.
(2010•舟山模拟)已知函数f(x)=cos(2x−π3)+sin2x−cos2x.
(2011•阜阳模拟)已知函数f(x)=sin2x+cos2x.