化简:y=cos^4 x+2 sinxcosx-sin^4 x
y=sin^2x-3sinxcosx+4cos^2x是否等于y=sin^2x+cos^2x+3cos^2x-3/2*si
求函数y=7-8sinxcosx+4cos^2x-4sin^x的最小值
已知f(x)=cos^4x-2根号3sinxcosx-sin^4x 化简
已知函数y=cos^4x-2sinxcosx-sin^4x,x∈[0,∏/2]
若x属于(0,π/4),求函数y=cos^2x-sin^x+2sinxcosx的值域
y=sin^2x-根号3sinxcosx-cos^2x化简
y=cos^x-4根号3sinxcosx-3sin^x的最大值
已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)
函数f(x)=(sin^4)x+2sinxcosx+(cos^4)x的最小值
函数f(x)=sin^4x+2sinxcosx+cos^4x 的最大值是多少?
已知函数f(x)=cos^4x-2sinxcosx-sin^4x
已知函数f(x)=cos^4x-2sinxcosx-sin^4x