已知sinx=1/3,sin(x+y)=1,则sin（2y+x)=

已知sinx=1/3,sin(x+y)=1,则sin（2y+x)= y=sinx+sin|x| 已知sin(x-y)cosx-cos(x-y)sinx=3/5求tan2y的值 已知sin(x+2y)=3sinx,求tan(x+y)*coty 已知函数y=-sin^2x+sinx(-π/2 sinx=1/3,sin(x+y)=1,求sin（2y+x）=? 已知sinx+siny=1/3,cosx-cosy=1/5,求cos(x+y),sin(x-y).求过程! 已知Sin(x+y)Cosx-Cos(x-x)Sinx=3/5求tan2y的值 求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3] 求函数的值域：(1)y=|sinx|-2sinx (2)y=sin|x| |sinx| 求函数的值域：(1)y=|sinx|-2sinx (2)y=sin|x|+|sinx| 已知sinx=3/5,x∈(π/2,π),求【sin(x+y)+sin(x-y)】/【cos（x+y）+cos（x-y）】的值 证明sin(x+y)sin(x-y)=sinx-siny 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 已知(sinx)2-(siny)2=m求sin(x y)sin(x-y)求sin(x+y)sin(x-y) y=sin|x|+|sinx|的图像 y=sin^2 x+3sinx-1 2.y=-cos^2 x+sinx+3,求下列函数值域 已知3sin^2x+2sin^2y=2sinx,则sin^2x+xin^2y的取值范围是