Meaning & use
Coterminal
Last updated
Describing two angles that share the same initial and terminal sides when drawn in standard position, differing only by a multiple of a full rotation.
See it in a sentence
An angle of 30 degrees and one of 390 degrees are coterminal.
To find a coterminal angle, add or subtract 360 degrees from the original measure.
A note on using this word
Coterminal angles are a key concept in trigonometry, useful for simplifying angle measures beyond a full circle.
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