❮ Math Methods
Example
Convert different degrees into radians:
# Import math Library
import math
# Convert different degrees into radians
print[math.radians[180]]
print[math.radians[100.03]]
print[math.radians[-20]]
Try it Yourself »
Definition and Usage
The math.radians[] method converts a degree value into radians.
Tip: See also math.degrees[] to convert an angle from radians to degrees.
Syntax
Parameter Values
| x | Required. The degree value to be converted into radians. If the parameter is not a number, it returns a TypeError |
Technical Details
A float value, representing the radian value of an angle
|
| 2.0 |
❮ Math Methods
Description
The radians[] method converts angle x from degrees to radians.
Syntax
Following is the syntax for radians[] method −
radians[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
x − This must be a numeric value.
Return Value
This method returns radian value of an angle.
Example
The following example shows the usage of radians[] method.
#!/usr/bin/python3 import math print ["radians[3] : ", math.radians[3]] print ["radians[-3] : ", math.radians[-3]] print ["radians[0] : ", math.radians[0]] print ["radians[math.pi] : ", math.radians[math.pi]] print ["radians[math.pi/2] : ", math.radians[math.pi/2]] print ["radians[math.pi/4] : ", math.radians[math.pi/4]]
Output
When we run the above program, it produces the following result −
radians[3] : 0.0523598775598 radians[-3] : -0.0523598775598 radians[0] : 0.0 radians[math.pi] : 0.0548311355616 radians[math.pi/2] : 0.0274155677808 radians[math.pi/4] : 0.0137077838904
python_numbers.htm
Description
Python number method radians[] converts angle x from degrees to radians.
Syntax
Following is the syntax for radians[] method −
radians[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
x − This must be a numeric value.
Return Value
This method returns radian value of an angle.
Example
The following example shows the usage of radians[] method.
#!/usr/bin/python import math print "radians[3] : ", math.radians[3] print "radians[-3] : ", math.radians[-3] print "radians[0] : ", math.radians[0] print "radians[math.pi] : ", math.radians[math.pi] print "radians[math.pi/2] : ", math.radians[math.pi/2] print "radians[math.pi/4] : ", math.radians[math.pi/4]
When we run above program, it produces following result −
radians[3] : 0.0523598775598 radians[-3] : -0.0523598775598 radians[0] : 0.0 radians[math.pi] : 0.0548311355616 radians[math.pi/2] : 0.0274155677808 radians[math.pi/4] : 0.0137077838904
python_numbers.htm
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degrees[] and radians[] are methods specified in math module in Python 3 and Python 2.
Often one is in need to handle mathematical
computation of conversion of radians to degrees and vice-versa, especially in the field of geometry. Python offers inbuilt methods to handle this functionality. Both the functions are discussed in this article.
radians[]
This function accepts the “degrees” as input and converts it into its radians equivalent.
Syntax : radians[deg] Parameters : deg : The degrees value that one needs to convert into radians Returns : This function returns the floating point radians equivalent of argument. Computational Equivalent : 1 Radians = 180/pi Degrees.
Code #1 : Demonstrating radians[]
Python3
import math
print["180 / pi Degrees is equal to Radians : ", end =""]
print [math.radians[180 /
math.pi]]
print["180 Degrees is equal to Radians : ", end =""]
print [math.radians[180]]
print["1 Degrees is equal to Radians : ", end =""]
print [math.radians[1]]
Output:
180/pi Degrees is equal to Radians : 1.0 180 Degrees is equal to Radians : 3.141592653589793 1 Degrees is equal to Radians : 0.017453292519943295
degrees[]
This function accepts the “radians” as input and converts it into its degrees equivalent.
Syntax : degrees[rad] Parameters : rad : The radians value that one needs to convert into degrees. Returns : This function returns the floating point degrees equivalent of argument. Computational Equivalent : 1 Degrees = pi/180 Radians.
Code #2 : Demonstrating degrees[]
Python3
import math
print["pi / 180 Radians is
equal to Degrees : ", end =""]
print [math.degrees[math.pi / 180]]
print["180 Radians is equal to Degrees : ", end =""]
print [math.degrees[180]]
print["1 Radians is equal to Degrees : ", end =""]
print [math.degrees[1]]
Output:
pi/180 Radians is equal to Degrees : 1.0 180 Radians is equal to Degrees : 10313.240312354817 1 Radians is equal to Degrees : 57.29577951308232
Application : There are many possible applications of these functions in mathematical computations related to geometry and has a certain applications in astronomical computations as well.