View source for Arccos

==English==

===Etymology===
From {{prefix|en|arc|cos}}.

===Noun===
{{en-noun}}

# {{abbreviation of|en|arccosine}}
#: <math> \arccos \left({1\over 2 \phi}\right) = {2 \pi \over 5}</math>
#* {{quote-book|en|title=The Soviet Economy in Regional Perspective|publisher=Praeger Publishers|year=1973|page=3|passage={{...}}with the appropriate constraint angles measured in terms of the '''arccoses''' and arctans.}}

====See also====
* {{l|en|arcsin}}
* {{l|en|arctan}}

===Anagrams===
* {{anagrams|en|a=accors|corsac}}

{{C|en|Trigonometric functions}}