C# MathF.Cos()用法及代碼示例

MathF.Cos(Single)是內置的MathF類方法，它返回給定浮點值參數(指定角度)的餘弦值。

用法： public static float Cos (float x);

Here, x is the angle(measured in radian) whose cosine is to be returned and the type of this parameter is System.Single.

返回值：此方法將返回System.Single類型的x的餘弦值。如果x等於NegativeInfinity，PositiveInfinity或NaN，則此方法返回NaN。

下麵的程序來說明上述方法的使用：

示例1:

// C# program to illustrate the 
// MathF.Cos(Single) Method 
using System; 
  
class GFG{ 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
        float a = 45f; 
  
        // converting value to radians 
        float b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
  
        a = 54f; 
  
        // converting value to radians 
        b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
        a = 70f; 
  
        // converting value to radians 
        b = (a * (MathF.PI)) / 180; 
  
        // using method and displaying result 
        Console.WriteLine(MathF.Cos(b)); 
    } 
}

輸出：

0.7071068
0.5877852
0.34202

示例2:當參數為NaN或Infinity時，顯示MathF.Cos()方法的用法。

// C# program to illustrate the 
// MathF.Cos(Single) method  
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
  
         // taking infinity values 
        float positiveInfinity = float.PositiveInfinity; 
        float negativeInfinity = float.NegativeInfinity; 
  
        // taking NaN  
        float nan = float.NaN; 
  
        float result; 
  
        // Here argument is negative infinity, 
        // so the output will be NaN 
        result = MathF.Cos(negativeInfinity); 
        Console.WriteLine(result); 
  
        // Here argument is positive infinity, 
        // so the output will also be NaN 
        result = MathF.Cos(positiveInfinity); 
        Console.WriteLine(result); 
  
        // Here argument is NaN, output will be NaN 
        result = MathF.Cos(nan); 
        Console.WriteLine(result); 
    } 
}

輸出：

NaN
NaN
NaN

相關用法

注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 MathF.Cos() Method in C# with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。