Atan Example Syntax VB.NET ASP.NET | Atan | Source Code
Atan Example Syntax VB.NET ASP.NET | Atan | Source Code
Summary: – Illustrates using Atan with Source Code Syntax Example in VB.NET ASP.NET.
Purpose:
converts a tangent to radians of an angle. The function
takes a double data type number and returns a double value
that repesents the radians of the angle for that tangent.
(you can convert the radians to degrees by multiplying
them by Math.PI/180)
Syntax:
Atan(double)
Atan(double)
Parameters | Description | double | The expression represents a tangent that is to be converted into radians of an angle. 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 |
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Result Data Type | Description | double | represents the radians of the angle of the tangent that was specified as the input parameter. |
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Quick Example | Atan(90) ‘ Returns 1.55968567289729 |
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Step 1: Click on Visual Basic to Cut-n-paste code into Atan.aspx.vb
Imports System Imports System.IO Imports System.Data Imports System.Math '******************************************************************************** ' Purpose: converts a tangent to radians of an angle. The function ' takes a double data type number and returns a double value ' that repesents the radians of the angle for that tangent. ' (you can convert the radians to degrees by multiplying ' them by Math.PI/180) ' ' Syntax: Atan(double) ' ' Parameter1: double - The expression represents a tangent that ' is to be converted into radians of an angle. ' 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 ' ' Result: double - represents the radians of the angle of the ' tangent that was specified as the input parameter. ' ' Quick Example: Atan(90) ' Returns 1.55968567289729 ' '******************************************************************************** ' This example is from http://idealprogrammer.com Partial Class _Atan Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Label1.Text = "Example #1: Atan(double)" TextBox1.Text = Atan(90) ' Returns 1.55968567289729 Label2.Text = "Example #2: Atan(double)" TextBox2.Text = Atan(-3.4) ' Returns -1.28474488507758 Label3.Text = "Example #3: Atan(double)" Dim Integer3 As Integer = Atan(-0) TextBox3.Text = Atan(-0) ' Returns 0 End Sub End Class |
Step 2: Click on XML to Cut-n-paste code into Atan.aspx
< %@ Page Language="VB" AutoEventWireup="false" CodeFile="Atan.aspx.vb" Inherits="_Atan" %> < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <h1><asp:label ID="Label1" runat="server" Text="Label"></asp:label> </h1> <asp:textbox ID="TextBox1" runat="server"></asp:textbox><br /> <h1><asp:label ID="Label2" runat="server" Text="Label"></asp:label> </h1> <asp:textbox ID="TextBox2" runat="server"></asp:textbox><br /> <h1><asp:label ID="Label3" runat="server" Text="Label"></asp:label> </h1> <asp:textbox ID="TextBox3" runat="server"></asp:textbox><br /> </div> </form> </body> </html> |
Prerequistes:
- Install Visual Web Developer 2010
- Install SQL Server Express
- Download Northwind and Pubs Databases
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- You can build your own library of syntax examples by using same web site over and over and just add new web forms to it.
Instructions:
- Use Visual Web Developer 2010
- Create new web site;
- Click File/New Web Site
- Select ASP.NET Website Template
- Select Visual Basic for Language
- name of Web Site could be VBNET_ASPNET_Syntax.
- Add New folder named “Functions”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: Functions
- Add New subfolder named “MathFunctions”
- Right-click Functions folder in solution explorer;
- add new folder;
- name of folder could be: MathFunctions
- Add Web Form Named Atan to MathFunctions folder
- Right-click MathFunctions folder;
- add new item;
- Select Web Form
- Check place code behind in separate file
- Web Form name could be Atan
- Click on Visual Basic in step 1 at the top of this page to copy code into code-behind Atan.aspx.vb
- Click on XML in step 2 above to copy code into web form Atan.aspx
- Right-click on Atan.aspx in solution explorer and select view in browser