# Python Number tan() Method

## Description

The method tan() returns the tangent of x radians.

## Syntax

Following is the syntax for tan() method −

tan(x)

Note − This function is not accessible directly, so we need to import math module and then we need to call this function using math static object.

## Parameters

• x − This must be a numeric value.

## Return Value

This method returns a numeric value between -1 and 1, which represents the tangent of the parameter x.

## Example

The following example shows the usage of tan() method.

#!/usr/bin/python
import math

print "tan(3) : ",  math.tan(3)
print "tan(-3) : ",  math.tan(-3)
print "tan(0) : ",  math.tan(0)
print "tan(math.pi) : ",  math.tan(math.pi)
print "tan(math.pi/2) : ",  math.tan(math.pi/2)
print "tan(math.pi/4) : ",  math.tan(math.pi/4)

When we run above program, it produces following result −

tan(3) :  -0.142546543074
tan(-3) :  0.142546543074
tan(0) :  0.0
tan(math.pi) :  -1.22460635382e-16
tan(math.pi/2) :  1.63317787284e+16
tan(math.pi/4) :  1.0

python_numbers.htm