Class 12 Vector Algebra · Mcq Single Correct1 Marksvector_identities
Class 12 Maths · Vector Algebra · Mcq Single Correct #12
For any vector a, find |a × i|² + |a × j|² + |a × k|².
✅ Step-by-Step Solution
Final Answer: Option (D): 2|a|²
- For a = (x,y,z), the sum is (y²+z²)+(x²+z²)+(x²+y²) = 2|a|².
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