sin^4+sin^2xcos^2x+cos^2x 证明 =1

sin^2x+cos^2x)(sin^4x-sin^2xcos^2x+cos^4x) =sin^4x-sin^2xcos 证明sin4次方x+cos四次方x=1-2sin²xcos²x 证明sin四次方x+cos四次方x=1-2sin平方xcos平方x (1-(sin^4x-sin^2xcos^2x+cos^4x)/sin^2x +3sin^2x 化简cos^4x+sin^2xcos^2x+sin^2x 求函数f(x)=(sin^4x+cos^4x+sin^2xcos^2x)/2 求函数y=2sin xcos x+2sin x+2cos x+4的值域 求sin^4x+cos^4x+4sin^2xcos^2x-1的最小正周期及值域. 证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4 求函数f(x)=sin^4x+cos^4x+sin^2xcos^2x/2-2sinxcosx-1/2sinxcosx+1 求函数y=sin^4x+cos^4x+4sin^2xcos^2x-1的最小正周期和值域 求函数y=sin^4x+cos^4x+4sin^2xcos^2x-1的最小正周期 值域