Mathematics · important
Normal form of line for JEE
Straight line: Various forms of equations of a line, intersection of lines, angles between two lines
Formula
\(x\cos\alpha+y\sin\alpha=p\)
Variables: \(p\) is perpendicular distance from origin, \(\alpha\) is angle made by the normal with positive \(x\)-axis.
Conditions: \(p\ge 0\).
Distance from origin, tangent forms, shortest distance problems.