VB.NET Acos Example – Code Sample Syntax

VB.NET Acos Example – Code Sample Syntax

Purpose: – Illustrates using .

Purpose:
takes a cosine as double data type number and returns
a double value that represents the angle in radians (you can convert
the radians to degrees by multiplying them by Math.PI/180)

Syntax:
Acos(double)

Parameters Description
double Any valid System.Double data type number between -1 and +1
– this represents the cosine that is to be converted into radians for an angle.
if number < -1 or > 1, NaN is returned – NaN stands for Not a Number

Result Data Type Description
double an angle measured in radians. The angle must be between 0 and pie.

Step 1: Click Visual Basic to Cut-n-paste code into clsAcos.vb

Imports System.Math
Public Class clsAcos
 
    Public Sub Main()
 
 
        '********************************************************************************
        ' Purpose: takes a cosine as double data type number and returns 
        ' a double value that represents the angle in radians (you can convert 
        ' the radians to degrees by multiplying them by Math.PI/180) 
        ' 
        ' Range: Any valid System.Double data type number between -1 and +1 
        ' if number < -1 or > 1, NaN is returned - NaN stands for Not a Number
        ' 
        ' Syntax: 	Acos(double)
        '  
        ' Parameter1: double - Any valid System.Double data type number between -1 and +1 
        ' - this represents the cosine that is to be converted into radians for an angle.
        ' if number < -1 or > 1, NaN is returned - NaN stands for Not a Number
        '
        ' Result: double - an angle measured in radians. The angle must be between 0 and pie. 
        ' 
        '
        '********************************************************************************
        ' This example is from http://idealprogrammer.com
 
        Console.WriteLine("Example #1: 	Acos(double)")
 
        Console.WriteLine(Acos(90)) ' Returns NaN
 
        'write blank line to make output easier to read
        Console.WriteLine()
 
        Console.WriteLine("Example #2: 	Acos(double)")
 
        Console.WriteLine(Acos(-3.4)) ' Returns NaN
        'write blank line to make output easier to read
        Console.WriteLine()
 
        Console.WriteLine("Example #3: 	Acos(double)")
 
        Dim Integer3 As Integer = Acos(-0)
 
        Console.WriteLine(Acos(-0)) ' Returns 1.5707963267949
 
        'Prevent console from closing before you press enter
        Console.ReadLine()
 
    End Sub
 
End Class

Step 2: Click Visual Basic to Cut-n-paste code into Module1.vb

Module Module1
 
    Sub Main()
 
 
        Dim myclsAcos As New clsAcos
        myclsAcos.Main()
 
 
 
    End Sub
 
End Module

Prerequistes:

  1. Install Visual Basic (Express or Standard Edition)
  2. Install SQL Server Express
  3. Download Northwind and pubs Database
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
  • You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Module1.vb

Instructions:
VB.NET Syntax Functions Acos

  1. Use Visual Basic 2010 Express or Standard Edition
  2. Create new project;
    • Click File/New Project
    • Select Console Application Template
    • Select Visual Basic for Language
    • name of project could be VBNET_Syntax.
  3. Add New folder named “Functions”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: Functions
  4. Add New subfolder named “MathFunctions”
    • Right-click Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: MathFunctions
  5. Add Class Named clsAcos to MathFunctions folder
    • Right-click MathFunctions folder;
    • add new item;
    • Select class
    • Class name could be clsAcos
  6. Click on Visual Basic in code in step 1 above to copy code into clsAcos.vb
  7. Click on Visual Basic in code in step 2 above to copy code into Module1.vb
  8. Click green arrow or press F5 to run program