If a = 2i + j and b = i − 2j, then |a×b| equals:
If a = 2i + j and b = i − 2j, then |a×b| equals:
- A. 3
- B. 4
- C. 5
- D. 6
Answer: C) 5
Explanation: |2(−2)−1(1)|=5.
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If a = 2i + j and b = i − 2j, then |a×b| equals:
Answer: C) 5
Explanation: |2(−2)−1(1)|=5.
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