f(x)=2sinx*cosx+2sin^2x-1
f(x)=2sinx*cosx+2sin^2x-1
(sin^x/sinx-cosx)-sinx+cosx/tan^2x-1
化简f(x)=4sinx*sin^2((π+2x)/4)+(cosx+sinx)(cosx-sinx)
求证 sin^2x/(sinx-cosx)-(sinx+cosx)/tan^2 x-1=sinx+cosx
已知函数f(x)=[(2根号3sin^2x-sin2x)*cosx/sinx]+1
已知函数f(x)=2cosx*sin(x+π/3)-√3sin^2x+sinx*cosx
设f(x)=2cosx.sin(x+π/3)-根号3 sin平方x+sinx.cosx
已知函数f(x)=2cosx•sin(x+π3)+sinx•(cosx−3sinx)
已知f(x)=sin^2+2SINX.COSX+3COSX^2
化简[sin^2(x)]/(sinx-cosx)-(sinx+cosx)/[tan^2(x)-1]-sinx
化简sin^4x/sinx-cosx - (sinx+cosx)cos^2x/tan^2x-1
f(x)=2cos*sin(x+π/3)-^3sin^2x+sinx*cosx