y= √3sin(π/3-2x)-cos2x的最小值求y= √3sin(π/3-2x)-cos2x的最小值

当cos^2x-cos^2y=√3/2时,求sin(x+y）×sin(x-y) Sin x-sin y=2/3 cos x-cos y=1/2 求cos(x-y) 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) y =(cos^2) x - sin (3^x),求y' 已知sinx=3/5,x∈(π/2,π),求【sin(x+y)+sin(x-y)】/【cos（x+y）+cos（x-y）】的值 已知函数f(x) =√3cos(2x-y)-sin(2x-y) (0 1.y=sin(-X+π/6)2.y=cos(-2X+π/3) cos(x-y/2)=-1/9,sin(x/2-y)=2/3,π/2 y=2cos(x/4+ π/3)-3sin(x- π/4)y=sin(4x- π/3)-cos(3x+π/2) 求y=sin＾2(x)+3sin(x)cos(x)-2cos＾2(x)的最大值 y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)的最值 用向量解 求y=sin x +2sin x cos x -3cos²x 的周期和值域, y=cosπx*cos(πx-π/3)+sin^2πx的周期、单调区间、值域 函数y=sin(2x+α)cos(x+α)-cos(2x+α)sin(x+α)在x=π/3处的导函数为 问道三角函数题已知sin(x)-sin(y)=-(2/3);cos(x)-cos(y)=(2/3);求cos(x-y) 已知sin[a-b]cos a-cos[b-a]sin a=3/5,b是第三象限角,求sin[b+5π/4]的值第一题1/2cos x-√3/2sin x第二题√3sin x+cos x第三题√2[sin x-cos x]第四题√2cos x-√6sin x 已知Sin x+Sin y=1/2,Cos x+Cos y=根号3/3,求S求Sin(x-y)/2 参数方程化为普通方程 x=(sinθ+cosθ)/(2sinθ+3cosθ) y=sinθ/(2sinθ+3cosθ）