已知sin=1/4,π/2

已知sin=1/4,π/2 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(a+π/4)sin(a-π/4)=1/3,若π/2 已知sin(a/2+π/6)=1/4求sin(π/6+a) 已知sinα=4/5,求下列三角函数值1）sin（-α）2）sin（π-α）3）sin（π+α）4）sin（2π-α） 已知-π/6＜=β＜π/4,3sin^2α-2sin^2β=2sinα,求sin^2β-1/2sin^2α的最值. 已知β∈[-π/6,π/4）,且3（sinα）^2-2（sinβ）^2=2sinα,求（sinβ）^2-1/2sinα的最小值 已知sin(π/4+2a)sin(π/4-2a)=1/4,a∈（π/4,π/2)求2sin方a+tana-cota-1 已知sin(π/4+x)sin(π/4-x)=1/6,x(π/2,π),则sin4x=? 已知sin(a+π/4)+sin(a-π/4)=√2/3则sin(a-π/4)/1-cos2a-sin2a的值 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^2（11π/6-x）如题, 已知sin(x+π/3)=1/4,求sin(2π/3-x)+cos²(π/6-x) 已知sin(π+α)=1/4,求sin(2π-α)-cot(α-π)cosα的值 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(π/6-α）=1/4,则sin(π/6+2α）=（）, 已知A+b+C=π 求证 cosA+cosB+cosC=1+4sin(A/2)sin(B/2)sin(C/2)