# C# Math - Sin() Method

The C# Sin() method returns trigonometric sine of an angle (angle should be in radians). In special cases it returns the following:

• If the argument is NaN, negative infinity or positive infinity, the method returns NaN.

In the graph below, Sin(x) vs x is plotted.

### Syntax

```public static double Sin (double arg);
```

### Parameters

 `arg` Specify the angle in radian.

### Return Value

Returns the trigonometric sine of an angle.

### Example:

In the example below, Sin() method is used to find out the trigonometric sine of an angle.

```using System;

class MyProgram {
static void Main(string[] args) {
double pi = Math.PI;
Console.WriteLine("Math.Sin(pi/6) = "
+ Math.Sin(pi/6));
Console.WriteLine("Math.Sin(pi/4) = "
+ Math.Sin(pi/4));
Console.WriteLine("Math.Sin(pi/3) = "
+ Math.Sin(pi/3));
Console.WriteLine("Math.Sin(Double.NaN) = "
+ Math.Sin(Double.NaN));
Console.WriteLine("Math.Sin(Double.NegativeInfinity) = "
+ Math.Sin(Double.NegativeInfinity));
Console.WriteLine("Math.Sin(Double.PositiveInfinity) = "
+ Math.Sin(Double.PositiveInfinity));
}
}
```

The output of the above code will be:

```Math.Sin(pi/6) = 0.5
Math.Sin(pi/4) = 0.707106781186547
Math.Sin(pi/3) = 0.866025403784439
Math.Sin(Double.NaN) = NaN
Math.Sin(Double.NegativeInfinity) = NaN
Math.Sin(Double.PositiveInfinity) = NaN
```

❮ C# Math Methods

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