sin(x+π/3)+2sin(x-π/3)-根号3cos(2π/3-x)求化简过程.

sin^2(π/3-x)+sin^2(π/6+x) 化简 sin²x+sin²(x+2π/3)+sin²(x-2π/3) 2sin(x+π/4)sin(x-π/4)=? sin^2(π/4 +x) sin(πx/2)求导 sin(x+π/3)用诱导公式化简如题sin(2x+π/3)和3sin(2x+π/3) 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 若tanx=2,则2sin平方x-3sin（π-x）sin（π/2-x）= sin(3π/2-x)化简 sinx>sin(2π/3-x)（0 解不等式sin(2x+π/3) sin(x+π/4) 已知函数f(x)=2根号3sin平方x-sin（2x-π/3) 化简2sin^2[(π/4)+x]+根号3（sin^x-cos^x）-1 当x趋向π lim (sin 3x )/( sin 2x) 的极限为? 化简:(sinα-cosα)^2+sin4α/2cos2α 化简:sin^2x+sin^2(x+2π/3)+sin^2(x-2π/3) 求sin^2(2x+π/3)的导数这样写为什么不对：[sin^2(2x+π/3)]'=[sin(2x+π/3)·sin(2x+π/3)]'=2[sin(2x+π/3)]'·sin(2x+π/3)=2cos(2x+π/3)·sin(2x+π/3)=sin(4x+2π/3)