Direction ratios provide a convenient way of specifying the direction of a line in three-dimensional space. Direction cosines are the cosines of the angles between a line and the coordinate axes.
Directional angles: The angles made by a line with the positive directions of the X, Y and Z axes are called directional angles.
Directional cosines: If α,ß and Γ are the directional angles of a directed line L, then cos α, cos β and cos γ are called the directional cosines of directed line L.
Our RD Sharma Solutions for class 12 is designed according to the latest syllabus prescribed by CBSE. Solving these questions will help you to score good marks in class 12 board examination. It also has important concepts and formulas for a better understanding of the chapter.
Direction Cosines and Direction Ratios Class 12th RD Sharma Exercises