(1):角度制:{β|β=45°±360°,β∈R}-675°,-315°,45°;
弧度制:{β|β=π/4±2π,β∈R}-15π/4,-7π/4,π/4;
(2):角度制:{β|β=-30°±360°,β∈R}-390°,-30°,330°;
弧度制:{β|β=-π/6±2π,β∈R}-13π/6,-π/6,11π/6;
(3):角度制:{β|β=420°±360°,β∈R}-660°,-300°,60°;
弧度制:{β|β=7π/3±2π,β∈R}-11π/3,-5π/3,π/3;
(4):角度制:{β|β=-225°±360°,β∈R}-585°,-225°,135°;
弧度制:{β|β=-5π/4±2π,β∈R}-13π/4,-5π/4,3π/4;