为什么sinˆ6 +cos ˆ6=sinˆ6(x+π/2)+cosˆ6(x+π/
为什么sinˆ6 +cos ˆ6=sinˆ6(x+π/2)+cosˆ6(x+π/
已知f(x)=-1/2+sin(π/6-2x)+cos(2x-π/3)+cos平方x.
函数f(x)=-√2(sin2x+π/4)+6 sin x cos x-2cos²x+1
已知函数f(x)=sin(2x+π/6)+sin(2x-π/6)+2cos²x
已知函数f(x)=sin(2x+π/6)+sin(2x-π/6)+2cos²x
已知函数f(x)=sin(2x+π/6)+sin(2x+π/6)+2cos²x
化简:1、sin(x-π/3)-cos(x+π/6)+√3cosx=?2、已知,sinα+sinβ=√2/2,求cosα
函数f(x)=cos2x+cos(x+π/3)+sin(x+π/6)+3sin^2x的最小值
已知函数f(x)=cos(π/6-2x)+cos(2x+π/6)+sin(2x+π/3)-sin(π/3-2x).
设函数f(x)=2+sin(3x+π/12)cos(x+π/6)+cos(3x+π/12)sin(x+π/6)
求证 tan(2π-X)sin(-2π-X)cos(6π-X)/ sin(X+3π/2)*cos(X+3π/2)=-ta
已知函数f(x)=2cos x sin(x+pai/6)-sin^2x+cos^2x.