How do you determine the measure of an angle coterminal with the angle 400^circ?

Coterminal of angle ${400}^{\circ} = 400 \pm \left(n \cdot 360\right)$ where n is an integer.
Coterminal angle of ${400}^{\circ} = 400 - 360 = {40}^{\circ}$
Coterminal angle of ${400}^{\circ} = 400 + 360 = {760}^{\circ}$
Coterminal angle of ${400}^{\circ} = 400 - 720 = - {320}^{\circ}$