Updating the samples to cover Sign(IntPtr) and SinCos(double)

Author: tannergooding

samples/snippets/csharp/VS_Snippets_CLR/math.sign/CS/sign.cs

@@ -15,6 +15,7 @@ public static void Main()
         float    xSingle1  = 0.0f;
         double   xDouble1  = 6.0;
         Decimal  xDecimal1 = -7m;
+        nint     xIntPtr1  = 8;
 
         // The following type is not CLS-compliant.
         sbyte    xSbyte1   = -101;
@@ -27,6 +28,7 @@ public static void Main()
         Console.WriteLine(str, "Single ", xSingle1, Test(Math.Sign(xSingle1)));
         Console.WriteLine(str, "Double ", xDouble1, Test(Math.Sign(xDouble1)));
         Console.WriteLine(str, "Decimal", xDecimal1, Test(Math.Sign(xDecimal1)));
+        Console.WriteLine(str, "IntPtr", xIntPtr1, Test(Math.Sign(xIntPtr1)));
 
         Console.WriteLine($"{nl}The following type is not CLS-compliant.");
         Console.WriteLine(str, "SByte  ", xSbyte1, Test(Math.Sign(xSbyte1)));
@@ -53,6 +55,7 @@ public static string Test(int compare)
 Single :   0 is equal to zero.
 Double :   6 is greater than zero.
 Decimal:  -7 is less than zero.
+IntPtr:    8 is greater than zero.
 
 The following type is not CLS-compliant.
 SByte  : -101 is less than zero.

samples/snippets/csharp/VS_Snippets_CLR_System/system.Math.SinCos/CS/sincos.cs

@@ -9,14 +9,15 @@ public static void Main()
     {
         Console.WriteLine(
             "This example of trigonometric " +
-            "Math.Sin( double ) and Math.Cos( double )\n" +
+            "Math.Sin( double ), Math.Cos( double ), and Math.SinCos( double )\n" +
             "generates the following output.\n" );
         Console.WriteLine(
             "Convert selected values for X to radians \n" +
             "and evaluate these trigonometric identities:" );
         Console.WriteLine( "   sin^2(X) + cos^2(X) == 1\n" +
                            "   sin(2 * X) == 2 * sin(X) * cos(X)" );
         Console.WriteLine( "   cos(2 * X) == cos^2(X) - sin^2(X)" );
+        Console.WriteLine( "   cos(2 * X) == cos^2(X) - sin^2(X)" );
 
         UseSineCosine(15.0);
         UseSineCosine(30.0);
@@ -30,6 +31,32 @@ public static void Main()
 
         UseTwoAngles(15.0, 30.0);
         UseTwoAngles(30.0, 45.0);
+
+        Console.WriteLine(
+            "\nWhen you have calls to sin(X) and cos(X) they \n" +
+            "can be replaced with a single call to sincos(x):" );
+
+        UseCombinedSinCosine(15.0);
+        UseCombinedSinCosine(30.0);
+        UseCombinedSinCosine(45.0);
+    }
+
+    // Evaluate trigonometric identities with a given angle.
+    static void UseCombinedSineCosine(double degrees)
+    {
+        double angle = Math.PI * degrees / 180.0;
+        (double sinAngle, double cosAngle) = Math.SinCos(angle);
+
+        // Evaluate sin^2(X) + cos^2(X) == 1.
+        Console.WriteLine(
+            "\n                           Math.SinCos({0} deg) == ({1:E16}, {2:E16})",
+            degrees, sinAngle, cosAngle);
+        Console.WriteLine(
+            "(double sin, double cos) = Math.SinCos({0} deg)",
+            degrees );
+        Console.WriteLine(
+            "sin^2 + cos^2 == {0:E16}",
+            sinAngle * sinAngle + cosAngle * cosAngle );
     }
 
     // Evaluate trigonometric identities with a given angle.

xml/System/Math.xml

@@ -7063,9 +7063,7 @@ The following example demonstrates how to use the <xref:System.Math.Round%28Syst
 ## Examples  
  The following example demonstrates how to use the <xref:System.Math.Sign%28System.IntPtr%29> method to determine the sign of an <xref:System.IntPtr> value and display it to the console.  
 
- :::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR/math.sign/CPP/sign.cpp" id="Snippet1":::
  :::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR/math.sign/CS/sign.cs" interactive="try-dotnet" id="Snippet1":::
- :::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR/math.sign/VB/sign.vb" id="Snippet1":::
   
  ]]></format>
         </remarks>
@@ -7362,9 +7360,7 @@ The following example demonstrates how to use the <xref:System.Math.Round%28Syst
 ## Examples  
  The following example uses <xref:System.Math.SinCos%2A> to evaluate certain trigonometric identities for selected angles.  
 
- :::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.Math.SinCos/CPP/sincos.cpp" id="Snippet1":::
  :::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.Math.SinCos/CS/sincos.cs" interactive="try-dotnet" id="Snippet1":::
- :::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.Math.SinCos/VB/sincos.vb" id="Snippet1":::  
   
  ]]></format>
         </remarks>

xml/System/MathF.xml

@@ -2108,15 +2108,6 @@ If the value of the `x` argument is <xref:System.Single.NaN?displayProperty=name
   
  This method calls into the underlying C runtime, and the exact result or valid input range may differ between different operating systems or architectures.  
   
-   
-  
-## Examples  
- The following example uses <xref:System.MathF.SinCos%2A> to evaluate certain trigonometric identities for selected angles.  
-
- :::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.MathF.SinCos/CPP/sincos.cpp" id="Snippet1":::
- :::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.MathF.SinCos/CS/sincos.cs" interactive="try-dotnet" id="Snippet1":::
- :::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.MathF.SinCos/VB/sincos.vb" id="Snippet1":::  
-  
  ]]></format>
         </remarks>
       </Docs>