化简cos(π/2-x)cos(π/2+x)cot(π-x)/sin(3π/2+x)cos(3π+x)tan(π+x)

cos(-x-2π) 和cos(π-x) 化简 化简sin2x-cos(2x+π/6) 根号2cos(x-π/4)化简 cos^2α+cos^2(α+π/3)-cosαcos(α+π/3)化简 化简cos 2x 化简tan（π-x）×cot（x-π）+cos²y-2cos²x 化简1+sin x/cos x·sin2x/2cos²（π/4-x/2） 化简2sinx*cosx*cos（2π-x）+cos（π+2x）*cosx*tanx 化简cos²(x/2-7π/8）-cos²（x/2+7π/8) cos(2x-π/3）+cos（2x+π/6）化简 化简cos(2π/3-x)+cos(2π/3+x)+cosx 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) 化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π) 化简sin(x)cos(x)cos(2x) 化简sin(x)cos(x)cos(2x) sin x cos x cos 2x 化简 已知f(x)=sin(π/6-x)^2-cos(π/4+x)^2+cos(π/6)cos(π/6-2x)化简f(x)