因为 tanα =tanβ,由三角函数线知,β=α+k*pi,k属于Z.解法二：因为 tanα =tanβ所以 tan(α-β) =(tanα -tanβ)/(1 +tanα *tanβ)=0.所以 α-β=k*pi,k属于Z.即 α=β+k*pi,k属于Z.= = = = = = = = =β=α+k*pi,...