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Angle Between Conjugate Diameters
If the slopes of two conjugate diameters are $$m_1$$ and $$m_2$$, the angle $$\theta$$ between them satisfies:
$$\tan\theta=\left|\frac{m_1-m_2}{1+m_1m_2}\right|$$
Usage
- Used when the angle between conjugate diameters is required.
