35 lines
716 B
Python
35 lines
716 B
Python
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from typing import Callable
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import numpy as np
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z0 = 20
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def find_root(f: Callable[[float], float], left: float, right: float, tolerance: float = 1e-6,
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max_iter: int = 100) -> float | None:
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a = f(left)
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b = f(right)
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x = None
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for _ in range(max_iter):
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if abs(a - b) < tolerance:
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break
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x = left - a * (left - right) / (a - b)
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y = f(x)
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if abs(y) < tolerance:
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break
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right, b = left, a
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left, a = x, y
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return x
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def cot(x):
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return 1 / np.tan(x)
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def func(z: float) -> float:
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first = np.sqrt((z0 / z) ** 2 - 1)
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second = cot(z)
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return first - second
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print(find_root(func, 6.2, 6.4, max_iter=1000))
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