How do you determine the two coterminal angle (one positive one negative) for the angle $- 420^{\circ}$ $-420^circ$ ?

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How do you determine the two coterminal angle (one positive one negative) for the angle $- 420^{\circ}$ $-420^circ$ ?

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Answer 1 · 2018-06-24T02:52:24

There are a countably infinite number of angles coterminal to $- 420^{\circ};$ $-420^circ;$ we're free to add or subtract $360^{\circ}$ $360^circ$ as many times as we like to come up with them. Adding once gives our negative answer, $- 60^{\circ}$ $-60^circ$ and once more our positive answer, $300^{\circ} .$ $300^circ.$

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How do you determine the two coterminal angle (one positive one negative) for the angle $- 420^{\circ}$ $-420^circ$ ?

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How do you determine the two coterminal angle (one positive one negative) for the angle $- 420^{\circ}$ $-420^circ$ ?