Trig
posted by Isabella .
Are 120 and 240 coterminal?

Coterminal A = A + k*360
To find a positive coterminal angle
A = 240
Coterminal A = 240 + 360
Coterminal A = 120
To find a negative coterminal angle
A = 240
Coterminal A = 240  360
Coterminal A = 600