trigonometric cosine

基本解释

Google can even work with trigonometric functions, including sine and cosine. Google.
甚至能用三角函数计算，包括正弦和余弦。
Is a mathematical function that returns the trigonometric cosine of the specified angle, in radians, in the specified expression.
一个数学函数，返回指定表达式中以弧度表示的指定角的三角余弦。
Sine and Cosine is the triangular relationship between the corners and trigonometric functions of the most common, the two most important theorems.
正、余弦定理的几点应用摘要正弦定理和余弦定理是三角形边角关系及三角函数种最常见、最主要的两个定理。