不正确,因为：{sin(-α-3/2π）sin（3/2π-α)tan^2(2π-α)} / {cos（π/2-α)cos(π/2+α)cot(π-α)}= {sin(π/2-α）sin（3/2π-α)tan^2(2π-α)} / {cos（π/2-α)cos(π/2+α)cot(π-α)}= {cosα(-cosα)tan...