arccos
English
Etymology
arc-
+
cos
Noun
arccos
(
plural not attested
)
Abbreviation of
arccosine
.
arccos
(
1
2
ϕ
)
=
2
π
5
{\displaystyle \arccos \left({1 \over 2\phi }\right)={2\pi \over 5}}
See also
arcsin
arctan
Anagrams
corsac
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