Tiêu đề Maths XI - Straigth lines - Normal form .ppt.ppt ✅

NORMAL FORM
PERPENDICULAR FORM OR NORMAL FORM Theorem: The equation of the line which is at a distance of p from the origin and α (0 ≤α<3600) is the angle made by the perpendicular (normal) with positive direction of x-axis is xcosα+ysinα=p.