cosine
US /ˈkoʊ.saɪn/
UK /ˈkəʊ.saɪn/
名詞
餘弦
the trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle and the hypotenuse
範例:
•
The cosine of a 60-degree angle is 0.5.
60度角的餘弦是0.5。
•
You need to use the cosine rule to solve this triangle.
你需要使用餘弦定理來解這個三角形。