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# Python Number atan() Function

## Description:

This function returns the arc tangent of x, in radians.

## Syntax:

    atan(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:

Here is the detail of parameters:

- x: Must be a numeric value

## Return Value:

The arc tangent of x, in radians.

## Example:

    #!/usr/bin/python
    import math

    print "atan(0.64) : ",  math.atan(0.64)
    print "atan(0) : ",  math.atan(0)
    print "atan(10) : ",  math.atan(10)
    print "atan(-1) : ",  math.atan(-1)
    print "atan(1) : ",  math.atan(1)

This will produce following result:

    atan(0.64) :  0.569313191101
    atan(0) :  0.0
    atan(10) :  1.4711276743
    atan(-1) :  -0.785398163397
    atan(1) :  0.785398163397

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