import numpy as np
import matplotlib.pyplot as plt

# ── Parameters ─────────────────────────────────────────────────────────────
seed     = 2903
n_points = 141

# ── Data ────────────────────────────────────────────────────────────────────
x = np.linspace(0.0, 2.0 * np.pi, n_points)

y0 = 1.857967 * np.sin(0.942220 * x + 5.084951)
y1 = 0.590013 * np.sin(1.142741 * x + 0.572998)
y2 = 1.924395 * np.sin(1.682643 * x + 4.928356)

# ── Plot ────────────────────────────────────────────────────────────────────
fig, ax = plt.subplots(figsize=(7, 4))
ax.plot(x, y0, color="tab:blue", label="A=1.86, f=0.94, φ=5.08")
ax.plot(x, y1, color="tab:orange", label="A=0.59, f=1.14, φ=0.57")
ax.plot(x, y2, color="tab:green", label="A=1.92, f=1.68, φ=4.93")
ax.set_xlabel("x")
ax.set_ylabel("y")
ax.set_title("Sinusoidal Line Plot  (3 curve(s))")
ax.legend(fontsize=8)
ax.grid(True, alpha=0.3)
fig.tight_layout()
plt.show()