(2011•江苏模拟)已知x=−π6
(2011•江苏模拟)得到函数y=cos(2x+π3)
(2011•江苏模拟)给出下列四个命题:①函数f(x)=3sin(2x−π3)
(2011•江苏模拟)函数y=3sin2x+cos2x,x∈R
(2011•江苏模拟)函数f(x)=3cosx+sinx
(2011•江苏模拟)设函数f(x)=2x|x|+1(x∈R)
(2011•江苏模拟)已知函数f(x)=lnx,g(x)=ax(a>0),设F(x)=f(x)+g(x)
(2011•江苏模拟)函数y=4sin(ωx+π4)cos(ωx−π4)−2sin(ωx−π4)cos(ωx+π4)(ω
(2011•江苏模拟)已知函数f(x)=x2-1,g(x)=a|x-1|.
(2010•江苏模拟)对于任意的x∈(π4
(2011•江苏模拟)已知函数y=ax3+bx2,当x=1时,有极大值3;则2a+b=______.
(2014•江苏模拟)已知函数f(x)=x3+x2-ax(a∈R).
(2011•甘肃模拟)已知函数f(x)=sin(π2+x)cosx−sinxcos(π−x),