(2009•松江区二模)函数f(x)=.4sinx51cos(π6−x).
(2009•松江区二模)函数f(x)=.4sinx51cos(π6−x).
(2012•松江区二模)解方程组:x
(2013•盐城二模)函数f(x)=2sin(x−π4)
(2009•崇明县二模)已知函数f(x)=2sin(π2+4x),x∈R,则f(x)是( )
(2009•东城区二模)设函数f(x)=2x−1x<0x
(2011•西城区二模)已知函数f(x)=cos2xsin(x+π4).
(2013•海淀区二模)已知函数f(x)=1−cos2x2sin(x−π4).
(2013•青岛二模)已知函数f(x)=sin(2x+π6)−2cos2x.
(2013•东莞二模)已知函数f(x)=tan(13x−π6)
(2011•西城区二模)已知函数f(x)=2sin(x+π4)−13sinx.
(2014•汕尾二模)函数f(x)=cos(2x−π3),x∈R.
(2012•韶关二模)函数f(x)=cos2(x−π4)−cos2(x+π4)(x∈R)是( )