餘矢
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
餘矢,割圓術一綫,割圓八綫之一。而餘矢函數,三角函數之一,英文vercosine,數學符號vcs,數式寫如。
餘矢函數函數假設,割圓半徑為一時,用正角求出餘矢綫有幾長。以往會用對數表求查得數值。
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