How can I convert radians to degrees with Python

Question

In the math module  I could only find math cos x   with cos sin tan acos asin atan  This returns the answer in radians  How can I get the answer in degrees   Here s my code   import math  x   math cos 1  y   x   180   math pi print y  30 9570417874   My calculator  on deg  gives me   cos 1  0 9998476

User · Answer

radian can also be converted to degree by using numpy

print(np.rad2deg(1))
57.29577951308232

if needed to roundoff ( I did with 6 digits after decimal below), then

print(np.round(np.rad2deg(1), 6)

57.29578

User · Answer

Python convert radians to degrees or degrees to radians   What are Radians and what problem does it solve    Radians and degrees are two separate units of measure that help people express and communicate precise changes in direction   Wikipedia has some great intuition with their infographics on how one Radian is defined relative to degrees   https   en wikipedia org wiki Radian    Python examples using libraries calculating degrees from radians    gt  gt  gt  import math  gt  gt  gt  math degrees 0                         0 radians    0 degrees 0 0  gt  gt  gt  math degrees math pi 2                 pi 2 radians is 90 degrees 90 0  gt  gt  gt  math degrees math pi                   pi radians is 180 degrees 180 0        gt  gt  gt  math degrees math pi  math pi 2        pi pi 2 radians is 270 degrees 270 0   gt  gt  gt  math degrees math pi math pi           2 pi radians is 360 degrees 360 0         Python examples using libraries calculating radians from degrees    gt  gt  gt  import math  gt  gt  gt  math radians 0             0 degrees    0 radians 0 0  gt  gt  gt  math radians 90            90 degrees is pi 2 radians 1 5707963267948966  gt  gt  gt  math radians 180           180 degrees is pi radians 3 141592653589793  gt  gt  gt  math radians 270           270 degrees is pi  pi 2  radians 4 71238898038469  gt  gt  gt  math radians 360           360 degrees is 2 pi radians 6 283185307179586   Source  https   docs python org 3 library math html angular-conversion  The mathematical notation     You can do degree radian conversion without libraries   If you roll your own degree radian converter  you have to write your own code to handle edge cases     Mistakes here are easy to make  and will hurt just like it hurt the developers of the 1999 mars orbiter who sunk  125m dollars crashing it into Mars because of non intuitive edge cases here     Lets crash that orbiter and Roll our own Radians to Degrees   Invalid radians as input return garbage output    gt  gt  gt  0   180 0   math pi                          0 radians is 0 degrees 0 0  gt  gt  gt   math pi 2    180 0   math pi                pi 2 radians is 90 degrees 90 0  gt  gt  gt   math pi    180 0   math pi                  pi radians is 180 degrees 180 0  gt  gt  gt   math pi  math pi 2     180 0   math pi      pi  pi 2  radians is 270 degrees 270 0  gt  gt  gt   2   math pi    180 0   math pi              2 pi radians is 360 degrees 360 0   Degrees to radians    gt  gt  gt  0   math pi   180 0               0 degrees in radians 0 0  gt  gt  gt  90   math pi   180 0              90 degrees in radians 1 5707963267948966  gt  gt  gt  180   math pi   180 0             180 degrees in radians 3 141592653589793  gt  gt  gt  270   math pi   180 0             270 degrees in radians 4 71238898038469  gt  gt  gt  360   math pi   180 0             360 degrees in radians 6 283185307179586   Expressing multiple rotations with degrees and radians  Single rotation valid radian values are between 0 and 2 pi   Single rotation degree values are between 0 and 360   However if you want to express multiple rotations  valid radian and degree values are between 0 and infinity    gt  gt  gt  import math  gt  gt  gt  math radians 360                   one complete rotation 6 283185307179586  gt  gt  gt  math radians 360 360               two rotations 12 566370614359172  gt  gt  gt  math degrees 12 566370614359172    math degrees and math radians preserve the 720 0                                  number of rotations   Collapsing multiple rotations   You can collapse multiple degree radian rotations into a single rotation by modding against the value of one rotation   For degrees you mod by 360  for radians you modulus by 2 pi      gt  gt  gt  import math  gt  gt  gt  math radians 720 90          2 whole rotations plus 90 is 14 14 radians 14 137166941154069  gt  gt  gt  math radians  720 90  360    14 1 radians brings you to  1 5707963267948966               the end point as 1 57 radians    gt  gt  gt  math degrees  2 math pi   math pi 2               one rotation plus a quarter  450 0                                                 rotation is 450 degrees   gt  gt  gt  math degrees   2 math pi   math pi 2    2 math pi    one rotation plus a quarter 90 0                                                     rotation brings you to 90    Protip  Khan academy has some excellent content to solidify intuition around trigonometry and angular mathematics  https   www khanacademy org math algebra2 trig-functions intro-to-radians-alg2 v introduction-to-radians

User · Answer

You can simply convert your radian result to degree by using  math degrees and rounding appropriately to the required decimal places  for example   gt  gt  gt  round math degrees math asin 0 5   2  30 0  gt  gt  gt

User · Answer

-fix- because you want to change from radians to degrees  it is actually  rad deg   math pi  180 and not deg 180 math pi  import math x 1                  in deg x   x math pi 180    convert to rad y   math cos x       calculate in rad  print y   in 1 line it can be like this  y math cos 1 math pi 180

User · Answer

I also like to define my own functions that take and return arguments in degrees rather than radians   I am sure there some capitalization purest who don t like my names  but I just use a capital first letter for my custom functions   The definitions and testing code are below    Definitions for trig functions using degrees  def Cos a       return cos radians a   def Sin a       return sin radians a   def Tan a       return tan radians a   def ArcTan a       return degrees arctan a   def ArcSin a       return degrees arcsin a   def ArcCos a       return degrees arccos a     Testing Code print Cos 90   print Sin 90   print Tan 45   print ArcTan 1   print ArcSin 1   print ArcCos 0     Note that I have imported math  or numpy  into the namespace with  from math import     Also note  that my functions are in the namespace in which they were defined   For instance   math Cos 45    does not exist

User · Answer

Python includes two functions in the math package  radians converts degrees to radians  and degrees converts radians to degrees   To match the output of your calculator you need    gt  gt  gt  math cos math radians 1   0 9998476951563913   Note that all of the trig functions convert between an angle and the ratio of two sides of a triangle  cos  sin  and tan take an angle in radians as input and return the ratio  acos  asin  and atan take a ratio as input and return an angle in radians  You only convert the angles  never the ratios

User · Answer

I like this method use sind x  or cosd x  import math  def sind x       return math sin math radians x    def cosd x       return math cos math radians x

[python] How can I convert radians to degrees with Python?

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