Imports System.Math
Public Class clsTan
 
    Public Sub Main()
 
 
        '********************************************************************************
        ' Purpose: converts an angle measured in radians to a tangent.  (you can convert 
        ' the radians to degrees by multiplying them by Math.PI/180) 
        ' 
        ' Syntax: 	Tan(doublenumber)
        '  
        ' Parameter1: doublenumber - double percision floating point 
        ' number representing an angle measured in radians. 
        '
        ' Result: double - represents the tangent of the angle specified in 
        ' parameter1. If parameter1 is equal to NaN, 
        ' NegativeInfinity,  or PositiveInfinity, 
        ' NaN (Not a Number) is returned.
        '
        '********************************************************************************
        ' This example is from http://idealprogrammer.com
 
        Console.WriteLine("Example #1: 	Tan(doublenumber)")
 
        Dim radians As Double = 30 * 180 / Math.PI
 
        Console.WriteLine("Tan(radians) = {0}", Tan(radians)) ' Returns 0.449218546627416
 
        'write blank line to make output easier to read
        Console.WriteLine()
 
        Console.WriteLine("Example #2: 	Tan(doublenumber)")
 
        radians = 90 * 180 / Math.PI
 
        Console.WriteLine("Tan(radians) = {0}", Tan(radians)) ' Returns 3.18545051165583
        'write blank line to make output easier to read
        Console.WriteLine()
 
        Console.WriteLine("Example #3: 	Tan(doublenumber)")
 
        Dim Integer3 As Integer = Tan(-0)
 
        radians = 180 * 180 / Math.PI
 
        Console.WriteLine("Tan(radians) = {0}", Tan(radians)) ' Returns -0.696494466235817
 
        'Prevent console from closing before you press enter
        Console.ReadLine()
 
    End Sub
 
End Class

Module Module1
 
    Sub Main()
 
 
        Dim myclsTan As New clsTan
        myclsTan.Main()
 
 
 
    End Sub
 
End Module