# Trig

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Are 120 and -240 coterminal?

• Trig -

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

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