化简 cosx/2+cos(x/2-3兀/2)
化简2sinx*cosx*cos(2π-x)+cos(π+2x)*cosx*tanx
sinx+cosx/sinx-cosx=2 求sinx/cos^3x +cosx/sin^3x
化简cos(2π/3-x)+cos(2π/3+x)+cosx
化简sin^4x/sinx-cosx - (sinx+cosx)cos^2x/tan^2x-1
化简:1.【(sin^2)(-X-π) *cos(π+X)cosX】/【tan(2π+X) *(cos^3 (-X-π)
设函数f(x)=2cosˆ4x+cosˆ3x-cosx-2∕cos2x+cosx+3
x∈[-∏/4,∏/4]时 f'(x)=cosx-1/cos^x=[(cosx)^3-1)/(cosx)^2
已知函数f(x)=cos(2x-π/3)+(cosx+sinx)(cosx-sinx)
cosx+根号3sinx=2cos(x-π/3)
f(x)=2cos(2x+π/3)+√3(sinx+cosx)^2 化简
1.化简f(x)=cosx(asinx-cosx)+cos(π/2-x)cos(π/2-x).2.化简f(x)=4cos
f(x)=sinx/4*cosx/4+根号3cos^2*x/4化简