1.已知sin(π/6-x)=1/4,sin(π/6+2x)=?2.tan70cos10(1-√3tan20)=?

已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 已知函数f(x)=(1+1 anx)sin^2x+m sin(x+π/4)sin(x-π/4) 已知sin(π/4+x)sin(π/4-x)=1/6,x(π/2,π),则sin4x=? 已知sin(x+π/3)=1/4,求sin(2π/3-x)+cos²(π/6-x) 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知 Sin(X+ 派/6)=1/4求 Sin(5/6派 - X)+Sin^2 (派/3 -X) 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2（11π/6-x）如题, 已知sinα（x+π/6）=1/4,则sin（5π/6-x）+sin（π/3-x）的平方=? 已知sin(x+6/π)=4/1,求sin(6/5π-x)+sin^2(3/π-x)的值 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin方(π/3-x)的值 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 式子sin^4θ+cos^2θ+sin^2θcos^2θ 的结果______若f(cosx)=cos2x,则f(sin π/6)=______已知f(x)按下列条件给出,满足f(f(x))＞f(3)的x的值为______x=1,f(x)=2; x=2,f(x)=3; x=3,f(x)=1.已知tanx=2(1)求 2/3sin^2x+1/4cos^2x 的值(2)求 2s s = 2*sin(x)-sin(2*x)+2/3*sin(3*x)-1/2*sin(4*x)+2/5*sin(5*x)用matlab画图,求教啊 1.已知sin(π/6-x)=1/4,sin(π/6+2x)=?2.tan70cos10(1-√3tan20)=? 已知sin(x-π/6)=1/2,0 已知函数f(x)=1/4(sin^2x-cos^2x-√3/2)+√3/2sin^2(x-π/4)1、求满足f(x)=√3/8的所有想x值的集合2、若s属于[-π/6,π/4],求f(X)最大最小值 已知sin(x+π/6)=1/3,则sin(5/6π-x)+cos2(π/3-x)=? 已知Sin x+Sin y=1/2,Cos x+Cos y=根号3/3,求S求Sin(x-y)/2