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cosine [cosines]▼(trigonometric function)noun[UK: ˈkəʊ.saɪn] [US: ˈkoʊ.saɪn]
arccosine▼(inverse of the cosine function)noun[UK: ˈɑːkəʊsˌaɪn] [US: ˈɑːrkoʊsˌaɪn]
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