cos(2x-π/3)+cos(2x+π/6)化简
化简:1.【(sin^2)(-X-π) *cos(π+X)cosX】/【tan(2π+X) *(cos^3 (-X-π)
已知f(x)=-1/2+sin(π/6-2x)+cos(2x-π/3)+cos平方x.
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
化简2sinx*cosx*cos(2π-x)+cos(π+2x)*cosx*tanx
设函数f(x)=cos(x+2/3π)+2cos^2 x/2,x∈R.
1.化简f(x)=cosx(asinx-cosx)+cos(π/2-x)cos(π/2-x).2.化简f(x)=4cos
求证 tan(2π-X)sin(-2π-X)cos(6π-X)/ sin(X+3π/2)*cos(X+3π/2)=-ta
化简 sinx+sin(x+2π/3)+cos(x+5π/6)
化简cos(π/2-x)cos(π/2+x)cot(π-x)/sin(3π/2+x)cos(3π+x)tan(π+x)
化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π
已知函数f(x)=2cos^2(ωx/2)+cos(ωx+π/3)(ω>0)
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1