(2011•惠州模拟)函数f(x)=2sin(π4−x)cos(π4+x)−1,x∈R是( )
(2011•惠州模拟)函数f(x)=2sin(π4−x)cos(π4+x)−1,x∈R是( )
(2011•武汉模拟)已知函数f(x)=sin(2x+π4)cosφ+cos(2x+π4)sinφ(其中x∈R,0<φ<
(2010•怀柔区模拟)已知函数f(x)=−cosx+cos(π2−x),x∈R
(2010•湖北模拟)已知函数f(x)=3sinωx+cos(ωx+π3)+cos(ωx−π3)−1(ω>0,x∈R),
(2009•湖南模拟)已知函数f(x)=2sin(x−π3),x∈R.
(2010•揭阳模拟)已知函数f(x)=3sinπx+cosπx,x∈R.
(2010•河南三模)已知函数f(x)=sin(3π4−x)−3cos(x+π4),x∈R,则f(x)是( )
(2013•惠州模拟)已知函数f(x)=2sin2x+2cos2x,x∈R.
(2011•武汉模拟)已知函数f(x)=[2sin(x+π3)+sinx]cosx−3sin2x,x∈R
(2011•惠州模拟)已知直线l:x-y+4=0与圆C:x=1+2cosθy=1+2sinθ
设函数f(x)=2sin(x−π4)cos(x+π4)+1,则f(x)是( )
(2011•浙江模拟)函数f(x)=sin(π3x−π2)+1是( )