Class 12 Vector Algebra · Mcq Single Correct1 Marksdirection_cosines
Class 12 Maths · Vector Algebra · Mcq Single Correct #7
Find the direction cosines of BA when A = (1,2,−1), B = (3,4,0).
✅ Step-by-Step Solution
Final Answer: Option (B): (−2/3,−2/3,−1/3)
- BA = A − B = (−2,−2,−1), with norm 3. Divide each component by 3.
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