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Python | math.tan() function
• Last Updated : 20 Mar, 2019

In Python, math module contains a number of mathematical operations, which can be performed with ease using the module. `math.tan()` function returns the tangent of value passed as argument. The value passed in this function should be in radians.

Syntax: math.tan(x)

Parameter:
x : value to be passed to tan()

Returns: Returns the tangent of value passed as argument

Code #1:

 `# Python code to demonstrate the working of tan()``    ` `# importing "math" for mathematical operations ``import` `math ``   ` `a ``=` `math.pi ``/` `6``    ` `# returning the value of tangent of pi / 6 ``print` `(``"The value of tangent of pi / 6 is : "``, end ``=``"") ``print` `(math.tan(a)) `

Code #2:

 `# Python program showing ``# Graphical representation of ``# tan() function ``import` `math``import` `numpy as np``import` `matplotlib.pyplot as plt `` ` `in_array ``=` `np.linspace(``0``, np.pi, ``10``) `` ` `out_array ``=` `[]`` ` `for` `i ``in` `range``(``len``(in_array)):``    ``out_array.append(math.tan(in_array[i]))``    ``i ``+``=` `1`` ` `  ` `print``(``"in_array : "``, in_array) ``print``(``"\nout_array : "``, out_array) `` ` `# red for numpy.sin() ``plt.plot(in_array, out_array, color ``=` `'red'``, marker ``=` `"o"``) ``plt.title(``"math.tan()"``) ``plt.xlabel(``"X"``) ``plt.ylabel(``"Y"``) ``plt.show() `
Output:

in_array : [0. 0.34906585 0.6981317 1.04719755 1.3962634 1.74532925
2.0943951 2.44346095 2.7925268 3.14159265]

out_array : [0.0, 0.36397023426620234, 0.8390996311772799, 1.7320508075688767, 5.671281819617707, -5.671281819617711, -1.7320508075688783, -0.8390996311772804, -0.36397023426620256, -1.2246467991473532e-16]

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