Is a mathematical function that returns the trigonometriccosine 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。
2
An algorithm to realize the cosine wave-crossing method in digital cycloconverter is performed by using the linear equation to approximate trigonometric equation.
在数字式交鄄交变频器中，一般采用直线方程近似三角方程的方法实现余弦交点法求触发角。
3
Sine and Cosine is the triangular relationship between the corners and trigonometric functions of the most common, the two most important theorems.