Let us take the angle to be 30 degrees. So three positive co terminal angles are:
[tex]\begin{gathered} 30+360=390 \\ 30+720=750 \\ 30+1080=1110 \end{gathered}[/tex]
Three negative co terminal angles are:
[tex]\begin{gathered} 30-360=-330 \\ 30-720=-690 \\ 30-1080=-1050 \end{gathered}[/tex]
Therefore the positive angles co terminal to 30 are 390,750 and 1110 degrees and the negative angles are -330,-690 and -1050 respectively.
