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Python – math.asin() function
• Last Updated : 28 May, 2020

Math module contains a number of functions which is used for mathematical operations. The math.asin() function returns the arc sine value of a number. The value passed in this function should be between -1 to 1.

Syntax: math.asin(x)

Parameter:This method accepts only single parameters.

• x :This parameter is the value to be passed to asin()

Returns:This function returns the arc sine value of a number.

Below examples illustrate the use of above function:

Example 1:

 `# Python code to implement``# the acos()function``       ` `# importing "math"``# for mathematical operations  ``import` `math  ``      ` `a ``=` `math.pi ``/` `6``       ` `# returning the value of arc sine of pi / 6  ``print` `(``"The value of arc sine of pi / 6 is : "``, end ``=``"")  ``print` `(math.asin(a))`

Output:

```The value of arc sine of pi / 6 is : 0.5510695830994463
```

Example 2:

 `# Python code to implement``# the aasin()function``import` `math ``import` `matplotlib.pyplot as plt  ``   ` `in_array ``=` `[``-``0.14159265``, ``-``0.57039399``, ``-``0.28559933``, ``            ``0.28559933``, ``0.57039399``,  ``0.94159265``] ``   ` `out_array ``=` `[] ``   ` `for` `i ``in` `range``(``len``(in_array)): ``    ``out_array.append(math.asin(in_array[i])) ``    ``i ``+``=` `1``      ` `print``(``"Input_Array : \n"``, in_array)  ``print``(``"\nOutput_Array : \n"``, out_array)    `` ` `plt.plot(in_array, out_array, ``"go:"``)  ``plt.title(``"math.asin()"``)  ``plt.xlabel(``"X"``)  ``plt.ylabel(``"Y"``)  ``plt.show()  `

Output:

```Input_Array :
[-0.14159265, -0.57039399, -0.28559933, 0.28559933, 0.57039399, 0.94159265]

Output_Array :
[-0.14207008957392517, -0.6069854488522558, -0.2896317474780172, 0.2896317474780172, 0.6069854488522558, 1.227328875116741]
```

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