单词	arc cosine
释义	arc cosine noun (ˌ)är(k)-ˈkō-ˌsīn  variants or arccosine plural arc cosines or arccosines : the inverse function of the cosine if y is the cosine of θ, then θ is the arccosine of y —abbreviation arccos Word History First Known Use circa 1884, in the meaning defined above
随便看	cockades Cockaigne Cockaignes cockal cockaleekies cockalorum cockalorums cockamamie cockamamy cockamaroo cockandy cockapert cockapoo cockapoos cockarouse cockateels cockatiel cockatiels cockatoo cockatoo bush cockatoo fence cockatoo-parrot cockatoos cockatouche cockatouches

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