Question 4 (OR 2 nd question)
Find the direction cosines of the line:
(x - 1)/2 = –y = (z + 1)/2

Last updated at Oct. 1, 2019 by Teachoo
Question 4 (OR 2 nd question)
Find the direction cosines of the line:
(x - 1)/2 = –y = (z + 1)/2
Transcript
Question 4 (OR 2nd question) Find the direction cosines of the line: (๐ฅ โ 1)/2 = โy = (๐ง + 1)/2 Given line (๐ฅ โ 1)/2 = โy = (๐ง + 1)/2 (๐ฅ โ 1)/2 = (โ๐ฆ)/1 = (๐ง + 1)/2 (๐ฅ โ 1)/2 = ๐ฆ/(โ1) = (๐ง + 1)/2 So, direction ratios are 2, โ1, 2 โด a = 2, b = โ1, c = 2 Direction cosines = 2/โ(2^2 + (โ1)^2 + 2^2 ) ,(โ1)/โ(2^2 + (โ1)^2 + 2^2 ) ,2/โ(2^2 + (โ1)^2 + 2^2 ) = 2/โ(4 + 1 + 4) ,(โ1)/โ(4 + 1 + 4) ,2/โ(4 + 1 + 4) = 2/โ9 ,(โ1)/โ9 ,2/โ9 = ๐/๐ ,(โ๐)/๐ ,๐/๐
CBSE Class 12 Sample Paper for 2019 Boards
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Question 4 (Or 1st)
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