The slopes of two lines are `(1)/(2)` and `3`. Find the angle between them.

Explanation

To find the angle between two lines given their slopes, we can use the formula:

\[ \tan \theta = \frac{m_1 - m_2}{1 + m_1 \cdot m_2} \]

where \( m_1 \) and \( m_2 \) are the slopes of the two lines.

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