A coterminal angle between 0° and 360° is 140°.
What is a coterminal angle?
Coterminal angles are angles in standard position (angles with the initial side on the positive x-axis) that have a common terminal side.
Possible coterminal angles of 860° -
860 - 360 = 500°
500 - 360 = 140°
140 - 180 = -40°
Since, we are asked about a coterminal angle between 0° and 360°, the only angle is 140°.
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