Cos Function

计算一个角度的余弦值，角度以弧度为单位，结果在 -1 到 1 之间。

Using the angle Alpha, the Cos function calculates the ratio of the length of the side that is adjacent to the angle, divided by the length of the hypotenuse in a right-angled triangle.

Cos(Alpha) = Adjacent/Hypotenuse

语法:


Cos (Number As Double) As Double

返回值:

Double

参数:

「数字」: 用于指定要计算余弦值的角度的数字表达式，以弧度为单位。

要将度转换为弧度，可将度乘以 pi/180；而要将弧度转换为度，则将弧度乘以 180/pi。

度=(弧度*180)/pi

弧度= (度*pi) /180

Pi is here the fixed circle constant with the rounded value 3.14159...

错误代码:

5 无效的过程调用

示例:


' 以下示例以直角三角形为例，要求输入
' 邻边和角度 (以度为单位)，并通过它们来计算三角形斜边的长度:
Sub ExampleCosinus
' 舍入后的 Pi = 3.14159
Dim d1 As Double, dAngle As Double
    d1 = InputBox("请输入邻边的长度Adjacen:  ","Adjacent")
    dAngle = InputBox("请输入角度Alpha (度): ","Alpha")
    Print "The length of the hypotenuse is"; (d1 / cos (dAngle * Pi / 180))
End Sub

Atn Function

Sin Function

Tan Function