### Advertisement

### Advertisement

Last updated at Aug. 23, 2021 by Teachoo

Transcript

Ex 10.2, 3 Write two different vectors having same direction.Two vectors have the same directions if their direction cosines are same Let π β = 1π Μ + 1π Μ + 1π Μ and π β = 2π Μ + 2π Μ + 2π Μ Magnitude of π β = β(12+12+12) |π β | = β(1+1+1) = β3 Direction cosines of π β are (1/β3,1/β3,1/β3) Magnitude of π β = β(22+22+22) |π β | = β(4+4+4) = 2β(3 ) Directions cosines of π β are (2/(2β3),2/(2β3),2/(2β3)) = (1/β3,1/β3,1/β3) As Direction cosines of π β and π β are same, they have the same direction.

Ex 10.2

Ex 10.2, 1

Ex 10.2, 2

Ex 10.2, 3 Important You are here

Ex 10.2, 4

Ex 10.2, 5 Important

Ex 10.2, 6

Ex 10.2, 7 Important

Ex 10.2, 8

Ex 10.2, 9

Ex 10.2, 10 Important

Ex 10.2, 11 Important

Ex 10.2, 12

Ex 10.2, 13 Important

Ex 10.2, 14

Ex 10.2, 15 Important

Ex 10.2, 16

Ex 10.2, 17 Important

Ex 10.2, 18 (MCQ) Important

Ex 10.2, 19 (MCQ) Important

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.