化简cos(X-30°)+sin(X+30°)+cosX+1
化简cos(X-30°)+sin(X+30°)+cosX+1
化简F(X)=2(COSX)^2+2 sin x cos x+1
化简sin^4x/sinx-cosx - (sinx+cosx)cos^2x/tan^2x-1
化简cosx-√3 cos(30°+x)+cos(x+60°)
化简cosx-根号3cos(30°+x)+cos(x+60°)
化简:{(1+sinx+cosx)[sin(x/2)-cos(x/2)}/根号下的(2+2cosx)
1、cos(x+B)*cos(x-B)=cosx-sin^2B
化简sin(x+y)sinx+cos(x+y)cosx等于?
化简sin(x+y)sinx+cos(x+y)cosx
化简cos(x+3o.)CoSx+Sin(x+30.)Sinx
化简cos(x+y)sinx-sin(x+y)cosx
cos(x+y)sinx-sin(x+y)cosx