cosine
US /ˈkoʊ.saɪn/
UK /ˈkəʊ.saɪn/
名词
余弦
the trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle and the hypotenuse
示例:
•
The cosine of a 60-degree angle is 0.5.
60度角的余弦是0.5。
•
You need to use the cosine rule to solve this triangle.
你需要使用余弦定理来解这个三角形。