Question: which angle is coterminal to 128?
Answer: A positive angle is 42° + 360°(1) or 402°. A negative angle is 42° + 360°(-2) or -678°. All angles having a measure of 128° + 360k°, where k is an integer, are coterminal with 128°. A positive angle is 28° + 360°(3) or 1208°.