arc cosine

noun

(ˌ)är(k)-ˈkō-ˌsīn How to pronounce arc cosine (audio)
variants or arccosine
plural arc cosines or arccosines
: the inverse function of the cosine
if y is the cosine of θ, then θ is the arccosine of y
—abbreviation arccos

Word History

First Known Use

circa 1884, in the meaning defined above

Time Traveler
The first known use of arc cosine was circa 1884

Dictionary Entries Near arc cosine

arc cosecant

arc cosine

arccot

See More Nearby Entries 

Cite this Entry

“Arc cosine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arc%20cosine. Accessed 22 Nov. 2024.

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