(2009•崇明县二模)已知函数f(x)=2sin(π2+4x),x∈R,则f(x)是( )
(2009•崇明县二模)已知函数f(x)=2sin(π2+4x),x∈R,则f(x)是( )
(2009•崇明县二模)已知函数f(x)=2sin(π4+2x)cos(π4+2x),x∈R,则f(x)是 (
(2013•崇明县二模)已知函数f(x)=(cos2xcosx+sin2xsinx)sinx,x∈R,则f(x)是(
(2012•崇明县一模)已知函数f(x)=cos(2x+π2 )(x∈R),下面结论错误的是( )
已知函数f(x)=(1+cos2x)sin∧2x,x∈R,则f(x)是
已知函数f(x)=3sin(2x+π/4)+1(x∈R)
(2013•崇明县二模)已知函数f(x)=sinx+acos
(2009•湖南模拟)已知函数f(x)=2sin(x−π3),x∈R.
(2012•江苏二模)已知函数f(x)=sin(π4+x)sin(π4-x)+3sinxcosx(x∈R)
(2011•深圳二模)设函数f(x)=sinωx+sin(ωx−π2),x∈R.
(2011•朝阳区二模)已知函数f(x)=2sinx•sin(π2+x)−2sin2x+1(x∈R).
(2011•顺义区二模)已知函数f(x)=2−sin(2x+π6)−2sin2x,x∈R