Direction ratios and Direction Cosines

Lesson 4 of 15 • 10 upvotes • 14:22mins

Jagat Singh

Learn how to find direction ratios and direction cosines for a vector. How to convert a given vector to unit vector to find its direction cosines. Geometrical meaning of direction cosines and pyq on vector algebra Now that we have understood what direction cosines are, we can move to direction ratios. Any numbers that are proportional to the direction cosines are calleddirection ratios, usually represented as a, b, c. So we can write, a = kl, b = km, c = kn where k is a constant.