# Python | math.sin() function

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

Syntax: math.sin(x)

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

Returns: Returns the sine of value passed as argument

Code #1:

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

Output:

```The value of sine of pi/6 is : 0.49999999999999994
```

Code #2:

 `# Python program showing  ` `# Graphical representation of  ` `# sin() function  ` `import` `math ` `import` `matplotlib.pyplot as plt  ` ` `  `in_array ``=` `[``-``3.14159265``, ``-``2.57039399``, ``-``0.28559933``, ` `            ``0.28559933``, ``2.57039399``,  ``3.14159265``] ` ` `  `out_array ``=` `[] ` ` `  `for` `i ``in` `range``(``len``(in_array)): ` `    ``out_array.append(math.sin(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.sin()"``)  ` `plt.xlabel(``"X"``)  ` `plt.ylabel(``"Y"``)  ` `plt.show()  `

Output:

in_array : [-3.14159265, -2.57039399, -0.28559933, 0.28559933, 2.57039399, 3.14159265]

out_array : [-3.5897930298416118e-09, -0.5406408168673427, -0.2817325547837714, 0.2817325547837714, 0.5406408168673427, 3.5897930298416118e-09]

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