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  1. Prepare
  2. Python
  3. Math
  4. Polar Coordinates
  5. Discussions

Polar Coordinates

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  • iwanabaengineer2
     + 1 comment
    from math import sqrt,atan,pi

z=complex(input())

x=z.real 
y=z.imag 

r=sqrt(x**2+y**2)

if x<0 and y>=0:
    theta=atan(y/x)+pi
elif x<0 and y<0:
    theta=atan(y/x)-pi
elif x>0 and y<0:
    theta=atan(y/x)
elif x>0 and y>=0:
    theta=atan(y/x)
elif x==0 and y>0:
    theta=pi/2
elif x==0 and y<0:
    theta=-pi/2
else:
    theta=0

print(f'{r}\n{theta}')

  • aiglelevant
     + 1 comment

    In barely few lines...

    import cmath
complex_num = complex(input())
print(abs(complex_num))
print(cmath.phase(complex_num))

  • Sinyuko
     + 0 comments
    from cmath import phase
z = input()
print(abs(complex(z)), phase(complex(z)), sep='\n')

  • gerardo_v_flores
     + 1 comment

    I didn't understand why they suggested the used of abs function in the question, here's my solution:

    import cmath
import math
valor = input()
complejo = complex(valor)
partes = None
real = None
coeficienteimaginario = None
if(valor.find("+") > 0):
    partes = valor.split("+")
    real = float(partes[0])
    coeficienteimaginario = float(partes[1].replace("j",""))
elif(valor.startswith("-")):
    partes = valor.split("-")
    real = float("-"+partes[1])
    coeficienteimaginario = float(partes[2].replace("j",""))
else:
    partes = valor.split("-")
    real = float(partes[0])
    coeficienteimaginario = float(partes[1].replace("j",""))
r = math.sqrt(pow(real,2)+pow(coeficienteimaginario,2))
print(r)
ph = cmath.phase(complejo)
print(ph)

  • adrien_cordonni1
     + 0 comments

    No one suggested a one-liner yet?

    print(*cmath.polar(complex(input())), sep='\n')