Three Dimensional Geometry|Direction Ratios and Direction Cosines

Three Dimensional Geometry: Lecture 2

Three Dimensional Geometry: Lecture 3

Three Dimensional Geometry: Lecture 1

Types OF vectors || Triangle law OF addition || Parallelogram law OF addition || Section formula || Direction Ratio and Direction Cosine

Direction cosine and ratio of line

Direction Cosines And Direction Ratios Of A Line

Basics OF 3 D- geometry || Direction cosines and Direction ratios

Quick Revision - Three Dimensional Geometry

Direction cosines of of a vector

If a line has the direction ratios -1, 2, 3, then its direction cosines are