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Python Math: Convert degree to radian

Python Math: Exercise-1 with Solution

Write a Python program to convert degree to radian.
Note : The radian is the standard unit of angular measure, used in many areas of mathematics. An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle; one radian is just under 57.3 degrees (when the arc length is equal to the radius).

Test Data:
Degree : 15
Expected Result in radians: 0.2619047619047619

Sample Solution-1:

Python Code:

pi=22/7
degree = float(input("Input degrees: "))
radian = degree*(pi/180)
print(radian)

Sample Output:

Input degrees: 90                                                                                             
1.5714285714285714

Pictorial Presentation:

Python Math: Convert degree to radian

Flowchart:

Flowchart: Convert degree to radian

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Use math.pi and the degrees to radians formula to convert the angle from degrees to radians.

Python Code:

from math import pi
def degrees_to_rads(deg):
  return (deg * pi) / 180.0
print(degrees_to_rads(180))
print(degrees_to_rads(90))

Sample Output:

3.141592653589793
1.5707963267948966

Flowchart:

Flowchart: Convert degree to radian

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m