Answer:
To find the angles coterminal with -60°
Cotermial angle of -60° in [0°.360°] range : 300° located in the fourth quadrant
Positive coterminal angles: 300°, 660°, 1020°, 1380°, 1740°...
Negative coterminal angles: -60°, -420°, -780°, -1140°...
Infinitely many other angles are coterminal to -60 degrees.
Hence the required angles are,
Positive coterminal angles: 300°, 660°, 1020°, 1380°, 1740°...
Negative coterminal angles: -60°, -420°, -780°, -1140°...