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Convert angles from degrees to radians for all elements in a given NumPy array
• Last Updated : 29 Aug, 2020

Angles can be expressed in both degrees and radians. In this article, we will know about the approaches and methods to convert degrees to radians.

Method #1 : Using radians()

This method takes an array as an input parameter and returns an array that has radian values.

## Python

 `# python code demonstrating usage of radians``# method to convert degrees to radians``# importing numpy library``import` `numpy as np``import` `math`` ` ` ` `# initialising an array``array``=``np.arange(``20.``)``*``90`` ` `# printing degree values``print``(``'Values of array in Degrees:'``,array)`` ` `# converting to radians``radian_array``=``np.radians(array)`` ` `# printing radian values``print``(``'Values of array in radians:'``,radian_array)`

Output: Method #2: Using deg2rad()

This method takes input array and returns an array that has radian values the same as the size of the input array.

## Python3

 `# python code demonstrating usage of radians``# method to convert degrees to radians``# importing numpy library``import` `numpy as np``import` `math`` ` `# initialising an array``array``=``np.arange(``20.``)``*``90`` ` `# printing degree values``print``(``'Values of array in Degrees:'``,array)`` ` `# converting to radians``radian_array``=``np.deg2rad(array)`` ` `# printing radian values``print``(``'Values of array in radians:'``,radian_array)`

Output: Method 3: Using Formula

## Python3

 `# python code demonstrating usage of radians``# method to convert degrees to radians``# importing numpy library``import` `numpy as np``import` `math`` ` `# initialising an array``array``=``np.arange(``20.``)``*``90`` ` `# printing degree values``print``(``'Values of array in Degrees:'``,array)``radian_array``=``[]`` ` `# converting to radians``for` `i ``in` `array:``    ``radian_array.append(i``*``math.pi``/``180``)`` ` `# printing radian values``print``(``'Values of array in radians:'``,radian_array)`

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