import sympy as sp
from IPython.display import display
th1,th2 = sp.symbols("theta1 theta2",real=True)
r1,r2 = sp.symbols("r1 r2",positive=True)
z1,z2,z3,z4 = sp.symbols("z1:5",comlex=True)
z1 = r1*(sp.cos(th1)+sp.I*sp.sin(th1))
print("z1は")
display(z1)
z2=r2*(sp.cos(th2)+sp.I*sp.sin(th2))
print("z2は")
display(z2)
z3 = z1*z2
print("z1*z2は")
display(z3)
print("これを簡素化すると")
display(z3.simplify())
z4 = z1/z2
print("z1/z2は")
display(z4)
print("これを簡素化すると")
display(z4.simplify())