Mathematics · essential
Angle between two lines using slopes for JEE
Straight line: Various forms of equations of a line, intersection of lines, angles between two lines
Formula
\(\tan\theta=\left|\dfrac{m_2-m_1}{1+m_1m_2}\right|\)
Variables: \(m_1,m_2\) are slopes; \(\theta\) is acute angle between lines.
Conditions: If \(1+m_1m_2=0\), then \(\theta=\frac{\pi}{2}\).
Angle, bisectors, line relation questions.