单词	arctangent
释义	arctangent noun arc·​tan·​gent (ˌ)ärk-ˈtan-jənt  variants or less commonly arc tangent plural arctangents also arc tangents : the inverse function of the tangent if y is the tangent of θ, then θ is the arctangent of y —abbreviation arctan Word History First Known Use 1886, in the meaning defined above
随便看	beakier beakiest beaking beaking joint beakiron beakking beakliker beaklikest beaks beaky beal bealach bealing beallach Bealtine beam beam anchor beam and scales beam antenna beam arm beam board beam bracket beam caliper beam ceiling beam compass

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