{β|β=k*360°+60°}, k=1,β=60°,k=-1,β=-300°
{β|β=k*360°-21°}, k=0,β=-21°,k=1,β=339°
{β|β=k*360°+360°14‘}, k=-1, β=14’,k=-2,β=-359°46‘
{β|β=k*360°+60°}, k=1,β=60°,k=-1,β=-300°
{β|β=k*360°-21°}, k=0,β=-21°,k=1,β=339°
{β|β=k*360°+360°14‘}, k=-1, β=14’,k=-2,β=-359°46‘