2sin(wx £

f(x)=sinwxcosPai/3+coswxsinPai/3-coswxcosPai/6+sinwxsinPai/6+coswx=sinwx+coswx=根号2sin(wx+Pai/4)T=2Pa

(1)sin(wx+π/6)=sinwxcosπ/6+coswxsinπ/6sin(wx-π/6)=sinwxcosπ/6-coswxsinπ/6f(x)=sin(wx+π/6)+sin(wx-π/6

(1)f(x)=sin²ωx+2√3sin(ωx+π/4)cos(ωx-π/4)-cos²ωx-√3=2√3·√2/2(sinωx+cosωx)·√2/2(sinωx+cosωx)

把三角函数分解,利用公式sin(x+y)=sinxcosy+cosxsiny,然后把2sin[wx-(π/6)]sin[wx+(π/3)分解开乘起来,与sin[2wx-(π/3)]相等,求解

(1)f(x)=2sin(wx-π/6)•sin(wx+π/2-π/6)=2sin[π/2+(wx-π/6)]•sin(wx-π/6)=2cos(wx-π/6)•s

f(x)=sinwxcospi/6+coswxsinpi/6+sinwxcospi/6-coswxsinpi/6-coswx-1=根3sinwx-coswx-1=2sin(wx-pi/6)-1所以值域

f(x)=√3sin²(wx/2)+sin(wx/2)cos(wx/2)=-(√3/2)*[1-2sin²(wx/2)-1]+(1/2)*2sin(wx/2)cos(wx/2)=-

∵sin^2wx=1-cos^2wx=1-(cos2wx+1)/2=1/2-(cos2wx)/2根号3sinwx*sin(wx+派/2)=根号3sinwx*coswx=(根号3sin2wx)/2∴f(

已知函数f(X)=sin^2wx+根号3sinwx*sin(wx+π/2)+2cos^2wx,x属于R,在y轴右侧的第一个最高点的横坐标为π/6,求w；若将函数f(x)的图像向右平移π/6个单位后,再

f(x)=2sin(wx+θ)×cos(wx+θ)+[2cos^2(wx+θ)-1]=sin(2wx+2θ)+cos(2wx+2θ)=√2sin(2wx+2θ+π/4)最小正周期为2π,所以2π/(2

f(x)=√3sin(wx+φ/2)*cos(wx+φ/2)+sin^2(wx+φ/2)=(√3/2)sin(2wx+φ)+(1/2)[1-cos(2wx+φ)]=sin(2wx+φ-π/6)+1/2

向右平移4π/3或向左平移2π/3,都关于原点对称sinx两个相邻对称中心距离是T/2所以T/2=4π/3+2π/3=2πT=2πT/w=2π/w=2πw=1

函数y=cos^2wx-sin^2wx=COS2WX;周期为π；可知w=1.f(x)=2sin(wx+π/4)=2sin(x+π/4)；sinx单增区间为[-π/2,π/2],故知,f（x）单增区间为

1：(sinwx)^2+√3sinwxsin(wx+π\2)=(sinwx)^2+√3sinwxcoswx=2[(sinwx)^2+(√3\2)sin2wx]\2=[2(sinwx)^2+√3sin2

f(x)=sin^2wx+√3sinwxsin(wx+π/2)=sin^2wx+√3sinwxcoswx=1/2(1-cos2wx)+√3/2sin2wx=√3/2sin2wx-1/2cos2wx+1

y=cos^2(wx)-sin^2(wx)=cos(2wx),最小正周期为2π/2w=π,则w=1,则函数y=2sin(wx+π/4）=2sin(x+π/4）,单调区间为-π/2

第一题A.第二题B

由1,3作为条件,可以得到2,由2,3作为条件,可以得到1,由1,3得到2,证明：由3可知w=2或-2,设定w=2时,由1可以得到2*π/12+t=kπ/2,k为不等于0的整数.得到t=kπ/2-π/

f(x)=sin(wx+π/6)+sin(wx-π/6)-2cos^2wx/2=sinwxcosπ/6+coswxsinπ/6+sinwxcosπ/6-coswxsinπ/6-2cos^2wx/2=2