Subscribe to our Youtube Channel - https://you.tube/teachoo
Ex 10.2, 12 - Chapter 10 Class 12 Vector Algebra
Last updated at May 29, 2018 by Teachoo
Transcript
Ex 10.2, 12 Find the direction cosines of the vector 𝑖 + 2 𝑗 + 3 𝑘 . Let 𝑎 = 𝑖 + 2 𝑗 + 3 𝑘 = 1 𝑖 + 2 𝑗 + 3 𝑘 Direction ratios are a = 1 , b = 2 , c = 3 Magnitude of 𝑎 = 12+ 22+ 32 𝑎 = 1+4+9 = 14 Direction cosines are 𝑎 𝑎, 𝑏 𝑎, 𝑐 𝑎 Direction cosines of 𝑎 = 𝟏 𝟏𝟒, 𝟐 𝟏𝟒, 𝟑 𝟏𝟒
Ex 10.2
Ex 10.2, 1
Ex 10.2, 2
Ex 10.2, 3
Ex 10.2, 4 Important
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
Ex 10.2, 12 You are here
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 Important
Ex 10.2, 19 Important
About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.