# C# Math - Tan() Method

The C# Tan() method returns trigonometric tangent 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, Tan(x) vs x is plotted.

### Syntax

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

### Parameters

 `arg` Specify the angle in radian.

### Return Value

Returns the trigonometric tangent of an angle.

### Example:

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

```using System;

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

The output of the above code will be:

```Math.Tan(pi/6) = 0.577350269189626
Math.Tan(pi/4) = 1
Math.Tan(pi/3) = 1.73205080756888
Math.Tan(Double.NaN) = NaN
Math.Tan(Double.NegativeInfinity) = NaN
Math.Tan(Double.PositiveInfinity) = NaN
```

❮ C# Math Methods

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