化简tan(α-π)cos(α-3π)/tan(3π+α)cot(-π-α)sin(-α)
化简sin^2(α+π)cos(π+α)cot(-α+2π)/tan(π-α)cos^3(-α-π)
化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
化简sin(2π-α)*tan(π+α)*cot(-α-π)/cos(π-α)*tan(3π-α)(急)
化简:[sin(π+α)*cos(π-α)*tan(π-α)]/[cos(π/2+α)*tan(3π/2-α)*tan(
已知tan(π/4+α)=-3,求[2(Sinα)的平方+3SinαCosα]/(Cotα-SinαCosα)的值.
已知sinα=根号2 cosβ,tanα=根号3 cotβ,-π/2
sin^2α*tanα+cos^2α*cotα-2sinα*cosα(π-α)
化简 f(α)=sin(π—α) cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)
化简 sinαcosα(tanα+cotα)
化简sinαcosα(tanα+cotα)
化简:sinα ×cosα(tanα+cotα)
1)求证cotαcosα/cotα-cosα=tan(α/2+π/4)