## C# Math.Tan() – Examples

In this tutorial, we will learn about the C# Math.Tan() method, and learn how to use this method to find the tangent of given angle, with the help of examples.

## Tan(Double)

Math.Tan(a) returns the tangent of the specified angle `a`. Tan() function considers the specified angle in radians.

### Syntax

The syntax of Tan() method is

`Math.Tan(Double a)`

where

Return Value

The method returns double value.

### Example 1 – Tan(45 degrees)

In this example, we will compute tangent for 45 degrees. We know that tan(45 degrees) is 1.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double angle = Math.PI/4; //45 degrees

Double value = Math.Tan(angle);
Console.WriteLine(\$"Tangent ({(180 / Math.PI) * angle} degrees) = {value}");
}
}```

Output

`Tangent (45 degrees) = 1`

### Example 2 – Tan(60 degrees)

In this example, we will compute tangent for 60 degrees. We know that tan(45 degrees) is square root 3.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double angle = Math.PI/3; //60 degrees

Double value = Math.Tan(angle);
Console.WriteLine(\$"Tangent ({(180 / Math.PI) * angle} degrees) = {value}");
}
}```

Output

`Tangent (60 degrees) = 1.73205080756888`

### Example 3 – Tan(0 degrees)

In this example, we will compute tangent for 0 degrees. We know that tan(0 degrees) is 0.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double angle = 0; //0 degrees

Double value = Math.Tan(angle);
Console.WriteLine(\$"Tangent ({(180 / Math.PI) * angle} degrees) = {value}");
}
}```

Output

`Tangent (0 degrees) = 0`

### Example 4 – Tan(90 degrees)

In this example, we will compute tangent for 90 degrees. We know that tan(90 degrees) is Positive Infinity.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double angle = Math.PI/2; //90 degrees

Double value = Math.Tan(angle);
Console.WriteLine(\$"Tangent ({(180 / Math.PI) * angle} degrees) = {value}");
}
}```

Output

`Tangent (90 degrees) = 1.63312393531954E+16`

### Example 5 – Tan(-60 degrees)

In this example, we will compute tangent for -60 degrees. We know that tan(-60 degrees) is negative of square root 3.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double angle = - Math.PI/3; //-60 degrees

Double value = Math.Tan(angle);
Console.WriteLine(\$"Tangent ({(180 / Math.PI) * angle} degrees) = {value}");
}
}```

Output

`Tangent (-60 degrees) = -1.73205080756888`

### Conclusion

In this C# Tutorial, we have learnt the syntax of C# Math.Tan() method, and also learnt how to use this method with the help of C# example programs.