Mathematics · important
Angles of a line with the coordinate axes for JEE
Direction ratios and direction cosines and the angle between two intersecting lines
Formula
\(\cos\alpha=l,\ \cos\beta=m,\ \cos\gamma=n\)
Variables: \(\alpha,\beta,\gamma\) are inclinations of the line with positive axes; \(l,m,n\) are d.c.s.
Converting axis-angle information into d.c.s or vice versa.