EN
C# / .NET - Math.Sin() method example
0 points
Math.Sin is a static method that takes only one parameter and returns an approximation of sine mathematical function.
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using System;2
3
public class Program4
{5
public static void Main(string[] args)6
{7
Console.WriteLine( Math.Sin( 0 ) ); // 0 <- 0 degrees8
Console.WriteLine( Math.Sin( 1.5707963267948966 ) ); // ~1 <- ~90 degrees == PI / 29
Console.WriteLine( Math.Sin( 3.1415926535897932 ) ); // ~0 <- ~180 degrees == PI10
Console.WriteLine( Math.Sin( 4.71238898038469 ) ); // ~-1 <- ~270 degrees == -PI * (3/2)11
Console.WriteLine( Math.Sin( 6.2831853071795850 ) ); // ~0 <- ~360 degrees == PI * 212
13
Console.WriteLine( Math.Sin(-1.5707963267948966 ) ); // ~-1 <- ~-90 degrees == -PI / 214
}15
}Note:
1.2246467991473532e-16and-1.133107779529596e-15should be equal to0but they are not because of compuptation precision error.
| Syntax |
xxxxxxxxxx1 namespace System2 {3 public static class Math4 {5 // ...6 public static double Sin(double number) { ... }7 // ...8 }9 } |
| Parameters | number - double value that represents an angle in radians (primitive value). |
| Result |
If the function can not calculate it returns |
| Description | Sin is a static method that takes only one parameter and returns an approximation of sin(x) mathematical function. |
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using System;2
3
public class Program4
{5
public static void Main(string[] args)6
{7
double x1 = 0.0; // beginning of calculation in radians8
double x2 = Math.PI / 2; // ending of calculation radians9
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double dx = Math.PI / 9; // calculation step in degrees11
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for (double rad = x1; rad <= x2; rad += dx)13
{14
double y = Math.Sin(rad);15
Console.WriteLine("sin(" + rad + " rad) = " + y);16
}17
}18
}Output:
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sin(0 rad) = 02
sin(0.3490658503988659 rad) = 0.34202014332566873
sin(0.6981317007977318 rad) = 0.64278760968653934
sin(1.0471975511965976 rad) = 0.86602540378443865
sin(1.3962634015954636 rad) = 0.984807753012208xxxxxxxxxx1
using System;2
3
public class Program4
{5
static double CalculateSin(double deg)6
{7
double radians = (Math.PI / 180) * deg;8
return Math.Sin(radians);9
}10
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public static void Main(string[] args)12
{13
// Example:14
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double x1 = 0.0; // beginning of calculation in degrees16
double x2 = 90.0; // ending of calculation degrees17
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double dx = 15.0; // calculation step in degrees19
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for (double deg = x1; deg <= x2; deg += dx)21
{22
double y = CalculateSin(deg);23
Console.WriteLine("sin(" + deg + " deg) = " + y);24
}25
}26
}Output:
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sin(0 deg) = 02
sin(15 deg) = 0.258819045102520743
sin(30 deg) = 0.499999999999999944
sin(45 deg) = 0.70710678118654765
sin(60 deg) = 0.86602540378443866
sin(75 deg) = 0.96592582628906837
sin(90 deg) = 1xxxxxxxxxx1
using System;2
using System.Text;3
4
public class Program5
{6
public static void Main(string[] args)7
{8
double x1 = 0.0; // beginning of sine chart9
double x2 = 2 * 3.14; // end of sine chart10
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double dx = 3.14 / 4.0; // x axis step12
double dy = 1.0 / 5.0; // y axis step13
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for (double rad = x1; rad < x2; rad += dx)15
{16
double y1 = 0.0;17
double y2 = Math.Sin(rad) + 1;18
StringBuilder line = new StringBuilder();19
for (double y = y1; y < y2; y += dy)20
{21
line.Append(" ");22
}23
Console.WriteLine(line + "+");24
}25
}26
}Output:
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+3
+4
+5
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+7
+8
+