Class 12 Vector Algebra · Mcq Single Correct1 Marksvector_identities
Class 12 Maths · Vector Algebra · Mcq Single Correct #15
Unit vectors a,b,c satisfy a + b + c = 0. Find a · b + b · c + c · a.
✅ Step-by-Step Solution
Final Answer: Option (C): −3/2
- Square the sum: 0 = 3 + 2(a · b + b · c + c · a), so the sum is −3/2.
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