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反余弦 /fǎnyúxián/ meaning in English

ChineseEnglish
反余弦 /fǎnyúxián/ noun

arccosine(inverse of the cosine function)
noun
[UK: ˈɑːkəʊsˌaɪn] [US: ˈɑːrkoʊsˌaɪn]