import numpy as np
import matplotlib.pyplot as plt

# Generate theta values
theta = np.linspace(0, 2 * np.pi, 1000)

# Generate radius values as a sine wave
sine = 30 + np.sin(6 * theta)
circle = np.full_like(theta, 30)

# Create polar plot
plt.figure()
ax = plt.subplot(111, projection='polar')
ax.plot(theta, sine)
ax.plot(theta, circle)

# Set the limits for the radial axis
ax.set_ylim(0, 35)

# Display the plot
plt.show()