“余弦”用英语怎么说

杆的方向通常用方向余弦来表示.The bar directions are conveniently specified by direction cosines.这就需要两个正余弦分解器.This requires two sine - cosine resolvers.现在让我们来考察最简单的波形,它的剖面图是正弦或余弦曲线.Let's now examine the simplest wave from where th...

“余弦”的拼音为：yú xián...