cosine function

• 余弦

cosine function的用法和样例：

例句

1. The inverse function of that restricted cosine function is called the arccosine function.
   被限定的余弦函数之反函数叫做反余弦函数。
2. Let's now examine the simplest wave from where the profile is a sine or cosine curve.
   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。