单词	arc cosine
释义	arc cosine /ˌɑːk ˈkəʊsʌɪn / (abbreviation arcos) noun A mathematical function that is the inverse of the cosine function.The arc cosine is the angle whose cosine is the specified number.... The following example returns the arc cosine of the value in radians. The inverse functions of the sine and the cosine are called the arc sine arcsin and the arc cosine arccos, respectively.
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