已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)/cos(-π-α)则f(-13π/3)的值是
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![已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)/cos(-π-α)则f(-13π/3)的值是](/uploads/image/z/7042017-57-7.jpg?t=%E5%B7%B2%E7%9F%A5f%28%CE%B1%29%3Dsin%28%CF%80-%CE%B1%29cos%282%CF%80-%CE%B1%29tan%28-%CE%B1%2B3%CF%80%2F2%29%2Fcos%28-%CF%80-%CE%B1%29%E5%88%99f%EF%BC%88-13%CF%80%2F3%EF%BC%89%E7%9A%84%E5%80%BC%E6%98%AF)
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已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)/cos(-π-α)则f(-13π/3)的值是
已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)/cos(-π-α)
则f(-13π/3)的值是
已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)/cos(-π-α)则f(-13π/3)的值是