If a = 3i + 4j and b = 4i − 3j, then a·b equals:
If a = 3i + 4j and b = 4i − 3j, then a·b equals:
- A. 25
- B. 0
- C. 7
- D. −25
Answer: B) 0
Explanation: 12 − 12 = 0.
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If a = 3i + 4j and b = 4i − 3j, then a·b equals:
Answer: B) 0
Explanation: 12 − 12 = 0.
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