化简:sin(x+y)cosx-1/2[sin(2x+y)-siny]

化简:sin(x+y)cosx-1/2[sin(2x+y)-siny] y=sin^2x(1-cosx/1+cosx-1+cosx/1-cosx)的周期 化简(sin^2 x/sin x-cosx)-(sin x+cosx/tan^2 x-1) y=2cos2x+sin平方x-4cosx.化简 求三角函数值域 y=sin^2x-cosx-1 y=(1+cosx)×sin（x/2） (0 (cosx)^2-(cosy)^2=1/3求sin(x+y)*sin(x-y). 求y=(2cosx*sin^2x)/(1+cosx)的值域 化简sin(x+y)sinx+cos(x+y)cosx 化简sin(x+y)sinx+cos(x+y)cosx等于? 化简cos(x+y)sinx-sin(x+y)cosx 化简cos(x+y)sinx-sin(x+y)cosx (sin^x/sinx-cosx)-sinx+cosx/tan^2x-1 化简sin^4x/sinx-cosx - (sinx+cosx)cos^2x/tan^2x-1 Y= SIN X - COS X / 2 COSX 的导数Y= SIN X - COS X / 2 COSX 的导数 cos(x+y)-cosx如何等于-2sin[(2x+y)/2]sin(y/2), 化简(sin^2x/sinx-cosx) -(sinx +cosx/tan^2x-1) 化简[sin^2(x)]/(sinx-cosx)-(sinx+cosx)/[tan^2(x)-1]-sinx