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CBSE Class 12-science Answered

The vector b= 3j + 4k is to be written as the sum of a vector u parallel to A= i +j and a vector v perpendicular to A. Then find value of u.
Asked by sunil2791 | 17 Nov, 2017, 07:05: PM
answered-by-expert Expert Answer
begin mathsize 16px style space straight b equals space 3 straight j space plus space 4 straight k straight b equals straight u plus straight v..... left parenthesis 1 right parenthesis straight u equals straight lambda open parentheses straight i plus straight j close parentheses..... parallel straight A. straight v equals 0...... perpendicular open parentheses straight i plus straight j close parentheses. open parentheses xi plus yj plus zk close parentheses equals 0 straight x equals negative straight y so space straight v equals xi minus xj plus zk from space left parenthesis 1 right parenthesis 3 straight j space plus space 4 straight k equals open parentheses λi plus λj close parentheses plus open parentheses xi minus xj plus zk close parentheses so space compare straight lambda equals 3 over 2 straight u equals 3 over 2 open parentheses straight i plus straight j close parentheses end style
Answered by Arun | 05 Dec, 2017, 03:58: PM

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CBSE 12-science - Maths
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CBSE 12-science - Maths
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Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 12-science - Maths
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CBSE 12-science - Maths
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CBSE 12-science - Maths
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CBSE 12-science - Maths
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