Coterminals

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What are coterminal angles?

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Coterminal angles are angles that share the same terminal side when graphed in standard position. They can be found by adding or subtracting multiples of 360° (or 2π radians).

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How do you find a positive coterminal angle for a given angle?

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To find a positive coterminal angle, add 360° (or 2π radians) to the given angle until the result is positive.

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How do you find a negative coterminal angle for a given angle?

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To find a negative coterminal angle, subtract 360° (or 2π radians) from the given angle until the result is negative.

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Convert 180° to radians.

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Convert 90° to radians.

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Convert 360° to radians.

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What is the coterminal angle of 450°?

Back

The coterminal angle of 450° is 90° (450° - 360° = 90°).

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What is the coterminal angle of -30°?

Back

The coterminal angle of -30° is 330° (-30° + 360° = 330°).

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