arc cosine

\ (ˌ)är(k)-ˈkō-ˌsīn How to pronounce arc cosine (audio) \
variants: or arccosine
plural arc cosines or arccosines

Definition of arc cosine

: the inverse function of the cosine if y is the cosine of θ, then θ is the arccosine of y abbreviation arccos

First Known Use of arc cosine

circa 1884, in the meaning defined above

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The first known use of arc cosine was circa 1884

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Cite this Entry

“Arc cosine.” Dictionary, Merriam-Webster, Accessed 22 Sep. 2020.

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