化简 sin^2(π/3,x）+sin^2(π/6+x）

化简 sin²x+sin²(x+2π/3)+sin²(x-2π/3) 化简2sin^2[(π/4)+x]+根号3（sin^x-cos^x）-1 化简：（sinx）^2+(sin（x+π/3))^2+(sin(x+2π/3))^2 化简 sin^2(π/3,x）+sin^2(π/6+x） 化简sin(2x+π/3)-（根号3）sin²x+sinxcosx+(根号3)/2 傅里叶级数作图f（x）=2sin[x] - sin[2x] + 2/3sin[3x] - 1/2sin[4x]我用mathematica输入程序Plot[{2sin[x],-2sin[x],2sin[x] - sin[2x],-2sin[x] + sin[2x],2sin[x] - sin[2x] + 2/3sin[3x],-2sin[x] + sin[2x] - 2/3sin[3x],2sin[x] - sin[2x] + 2/3si 化简sin（2π+x）cos（π-x）sin（π-x）/cos（x-π）sin（-π-x）sin（π+x） 化简[1-(sin^4 x-sin^2 xcos^2 x+cos^4 x)]/(sin^2 x)+3sin^2 x 若tanx=2,则2sin平方x-3sin（π-x）sin（π/2-x）= sin^2(π/3-x)+sin^2(π/6+x) sin(3π/2-x)化简 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x 化简:(sinα-cosα)^2+sin4α/2cos2α 化简:sin^2x+sin^2(x+2π/3)+sin^2(x-2π/3) 化简sin(α+β)+sin(α-β)+2sinαsin(3π/2-β)= 化简：[sin（2π－2）cos（π＋x）tan（π－x）]/[cos（π－x）sin（3π－x）sin...化简：[sin（2π－2）cos（π＋x）tan（π－x）]/[cos（π－x）sin（3π－x）sin（－π－x）] 化简sin(-2x) sin（π-x）sin（π/2 -x）+(cosx）²化简 y=sin(x+π/3)sin(x+π/2)化简