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Which of the following angles are not coterminal with the other three 591 degrees 231 degrees 51 degrees -129 degrees

User Veronika
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Coterminal angles are separated by 360 degrees. Therefore, -129 is equivalent to (-129 + 360) = 231, and 231 is also equivalent to (231 + 360) = 591 degrees. Therefore, only 51 degrees is not coterminal with the other options.
User MiguelMunoz
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