PB | Class10 | Maths | Chapter 7 | Nirdesh Ank_03 (PSEB)

Direction Ratio and Direction Cosines are two methods of expressing the direction of a line in three-dimensional space. Direction ratios are the ratios of the distances between any two points on the line and direction cosines are the cosines of the angles between the line and each of the coordinate axes. These concepts are important in mathematics as well as in physics and engineering, where they are used to describe the direction of vectors.

Students studying this chapter will likely learn how to find the direction ratios and direction cosines of a given line, as well as how to use them to determine the angle between two lines, the equation of a line in three-dimensional space, and more. This knowledge will provide a foundation for further study of geometry and vectors in higher classes.

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