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Pronunciation varies by accent · noun
(trigonometry) Any of several single-valued or multivalued functions that are inverses of the cosine function..
Use arc cosine when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Arc cosine means (trigonometry) Any of several single-valued or multivalued functions that are inverses of the cosine function..
Common synonyms include anticosine, inverse cosine, arccos, cos-1.
The opposite depends on the specific sense.
Use arc cosine where its definition matches the intended context.
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